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{{#Wiki_filter:PRIGRITY3( | {{#Wiki_filter:PRIGRITY3(ACCELERATED RIDSPROCI'.SSIiG REGULATORY INFORMATION DISTRIBUTION SYSTEM(RIDS)ACCESSION NBR:9512110297 DOC.DATE: | ||
95/12/04NOTARIZED: | |||
NODOCKETNFACIL:50-389 St.LuciePlant,Unit2,FloridaPower&LightCo.05000389AUTH.NAMEAUTHORAFFILIATION SAGER,D.A. | |||
FloridaPower&LightCo.RECIP.NAME RECIPIENT AFFILIATION DocumentControlBranch(Document ControlDesk) | |||
==SUBJECT:== | ==SUBJECT:== | ||
ForwardsRev0toPlantAdministrative Procedure 2-0010024, "Inservice TestingProgramforPumps&Valves."DISTRIBUTION CODE:A047DCOPIESRECEIVEDLTRENCLSIZE:TITLE:ORSubmittal: | |||
St.LucieUnit2DocketNo.50-389In- | Inservice/Testing/Relief fromASMCode-GL-89-04/NOTESRECIPIENT IDCODE/NAME PD2-1LANORRIS,JINTERNAL: | ||
ACRS01EEMCBNUDOCS-ABSTRACT RES/DET/EMMEB EXTERNAL: | |||
LITCOANDERSONNRCPDRCOPIESLTTRENCL111160111111111111RECIPIENT IDCODE/NAME PD2-1PDAEOD/SPD/RAB NRR/DE/ECGB NRR/DE/EMEB OGC/HDS3RES/DSIR/EIB NOACCOPIESLTTRENCL11111111101111NOTETOALL"RIDS"RECIPIENTS: | |||
PLEASEHELPUSTOREDUCEiVKSTE!CONTACTI'IIEDOCL'i!ENT CONTROLDESk,ROOMPl.37(EXT.504.~0S3)TOELIXI!NATEYOL"RiAXILPl<OilDISTRIBUTION LISTSI'ORDOCLMEN'I'SYOL'ON"I'II~D!TOTALNUMBEROFCOPIESREQUIRED: | |||
LTTR21ENCL14 FloridaPower&LightCompany,P.O.Box128,FortPierce,FL34954-0128 December4,1995r,-95-320 10CFR50.410CFR50.55aU.S.NuclearRegulatory Commission Attn:DocumentControlDeskWashington, D.C.20555RE:St.LucieUnit2DocketNo.50-389In-Service TestProgram-Revision2SecondTen-YearIntervalResonsetoSafetEvaluation 0enItemsOnMay2,1994,NRCissuedasafetyevaluation (SE)onthesecondten-yearintervalin-service test(IST)program,Revision0,forSt.LucieUnit2.IncludedwiththeNRCSEwasacopyoftheNRCcontractor's technical evaluation report(TER).Forcertainreliefrequests, implementation wasgranted,authorized, orapprovedasacceptable providedtheactionitemsoranomalies identified inSection5oftheTERwereaddressed withinoneyearofthedateoftheSEorbytheendofthenextrefueling outage,whicheverwaslater.Attachment 1providesaresponseorclarification toeachTERactionitem.Severaloftheitemsidentified intheTERwerepreviously addressed inRevision1oftheISTprogramwhichwassubmitted totheNRCbyFPLletterL-94-212datedAugust22,1994.ThisrevisionoftheUnit2secondten-yearintervalISTprogramhasbeenissuedasplantadministrative procedure, AP2-0010024 Revision0.Acopyofthisprocedure isenclosedforyourinformation. | |||
Pleasecontactusifthereareanyquestions aboutthissubmittal. | |||
Verytrulyyours,D.A.ViceSt.LgeresidentiePlantDAS/GRMcc:StewartD.Ebneter,RegionalAdministrator, RegionII,USNRCSeniorResidentInspector, USNRC,St.LuciePlantADGCKpgpp()pBp PDRanFPLGroupcompany h | |||
St.LucieUnit2DocketNo.50-389In-Service TestProgram-Revision2SecondTen-YearIntervalResponsetoSafetyEvaluation OpenItemsIn-Service TestProgramRevision2SecondTen-YearIntervalResponsetoNRCSafetyEvaluation OpenItems12/04/95.... | |||
9512110297 BACKGROUND OnSeptember 15,1992,FPLletterL-92-247transmitted Revision2ofthefirstten-yearintervalISTprogramtotheNRC.Thisrevisionwasacompleterevisionoftheprogramtoincorporate theguidanceofGenericLetter89-04,Guidanceondeveloping Acceptable Inservice TestingPrograms. | |||
OnAugust3,1993,FPLletterL-93-184transmitted Revision0ofthesecondten-yearintervalISTprogramtotheNRC.Thesecondten-yearintervalbeganonAugust8,,1993.OnAugust23,1993,NRCissuedthesafetyevaluation (SE)onRevision2ofthefirstten-yearintervalISTprogram.ThisSEincludedacopyoftheNRCcontractor's technical evaluation report(TER).Section4oftheTERincludedactionitemswhichtheNRCrequested FPLtoaddresswithinoneyearofthedateoftheSEorthenextrefueling outagewhicheverwaslater.OnAugust22,1994,FPLletterL-94-212transmitted Revision1ofthesecondten-yearintervalISTprogramtoaddressNRCopenitemsidentified intheAugust23,1993SEandNRCcontractor's TER.Theseopenitemswerecarriedforwardfromthefirstten-yearintervalISTprogram.OnMay2,1994,theNRCissuedtheSEforRevision0ofthesecondten-yearintervalISTprogram.IncludedwiththeNRCSEwasacopyoftheNRCcontractor's technical evaluation report(TER).Forcertainreliefrequests, implementation wasgranted,authorized, orapprovedasacceptable providedtheactionitemsoranomalies identified inSection5oftheTERwereaddressed withinoneyearofthedateoftheSEorbytheendofthenextrefueling outage,whicheverwaslater.Severaloftheseitemswerepreviously addressed inRevision1ofthesecondten-yearintervalISTprogram.Thissubmittal providesaresponsetotheremaining actionitemsandanomalies. | |||
Therecommended actionsfromeachsubpartoftheTERSection5havebeenlistedbelowalongwiththeSt.Lucieresponse. | |||
Foritemswhichduplicated openitemsfromtheAugust23,1993NRCSE,andwhichwerepreviously addressed inRevision1ofthesecondten-yearintervalISTprogramonlyacrossreference isprovided. | |||
TERSection5.1NRCRecommended Action:TheISTProgramdoesnotincludeadescription of:howthecomponents wereselected, howtestingrequirements wereidentified foreachcomponent, orthesafetyfunctionofthevalves.Thereviewperformed forthisTERdidnotincludeverification thatallpumpsandvalveswithinthescopeof10CFR50.55aandSectionXIarecontained intheISTProgram,anddidnotensurethatall 0 | |||
applicable testingrequirements havebeenidentified. | |||
Thelicenseeisrequested.to includethisinformation intheISTProgram.Theprogramshoulddescribethedevelopment process,suchasalistingofthedocuments used,themethodofthebasisforcategorizing valves,andthemethodorprocessusedformaintaining theprogramcurrentwithdesignmodifications orotheractivities performed under10CFR50.59.Additionally, foreachinterval, thelicenseeshouldmaintainanaccuratestatusofthereliefrequestsincluding theirrevisionandNRCapproval. | |||
St.LucieResponse: | |||
Thisaction"itemisidentical toitem4.1oftheNRCSEissuedAugust23,1993.FPLresponded tothisactionitemintheresponsetothepreviousSEandincorporated thechangesintoRevision1ofthesecondten-yearintervalISTprogramwhichwastransmitted byFPLletter,L-94-212datedAugust22,1994.NRCRecommended Action:Thelicenseehasdeletedthedieselairstartandfueloil,andinstrument airsystemfromtheISTProgram.ThelicenseeexplainsinthesummaryofchangesbetweenRevision2oftheFirstIntervaltoRevision0ofthe,SecondIntervalthatthesesystemsarenotrequiredtobebuilttoASMEClass1,2,or3standards perRegulatory Guide1.26,but"werebuilttoClassstandards attheoptionofFPL.Inaccordance withIWA-1300(e) | |||
(sic),including thepumpsandvalvesinthesesystemsintheISTprogramwasattheoptionofFPLandnotarequirement. | |||
Paragraph IWA-1320(e) statesthat"Ifsystemssafetycriteriapermitasystemtobenonnuclear safetyClassandanOwneroptionally classifies andconstructs thatsystem,oraportionthereof,toClass2or3requirements, theapplication oftherulesof(a)aboveisattheoptionoftheOwnerandisnotarequirement ofthisDivision." | |||
Section3.2.2oftheFSAR,however,statesthatthedieselsystemsaresafety-related QualityGroupCcomponents andarerequiredtobebuilttoSectionIII,Class3requirements. | |||
Components wereclassified pertheFSARinaccordance withANSIN18.2,aswellasRegulatory Guide1.26.Theregulations requirepumpsandvalvesclassified bytheOwnerasClass1,2,or3tobetestedinaccordance withSectionXI.Theregulations donotlimitthescopeoftheISTprogramtoonlythosesystemsdiscussed inRegulatory Guide1.26.TheISTprogramscopeshouldbeconsistent withtheclassification ofcomponents inthesafetyanalysisreport.TheISTProgramorFSARshouldberevisedaccordingly. | |||
St.LucieResponse: | |||
Thedieselairstartandfueloil,andinstrument airsystemswerepreviously intheISTprogrambecausetheywerebuiltandaremaintained toQualityGroupBandCrequirements. | |||
Additionally, FSARTable3.2-1liststhedieselfueloilsystemasQualityGroupC(ASMEClass3).However,theseclassifications werepreviously considered asoptionalupgradessinceRegulatory Guide1.26doesnotrequirethesesystemstobeincludedinQualityGroupsA,B,orC.Regulatory Guide1.26isthegoverning documentforsystemQualityGroupclassifications sinceFSARSection3.2.2statesthat"Systemsafetyclassifications anddesignandfabrication requirements meettheintentofRegulatory Guide1.26,QualityGroupClassifications andStandards forWater-,Steam-,andRadioactive-Waste-Containing Components ofNuclearPowerPlants,February1976(R3)."ThesesystemsdonotrequiretestingpertheCodesinceParagraph IWA-1320.(e) statesthat"Ifsystemssafetycriteriapermitasystemtobenonnuclear safetyClassandanOwneroptionally classifies andconstructs thatsystem,oraportionthereof,toClass2or3requirements, theapplication oftherulesof(a)isattheoptionoftheOwnerandnotarequirement ofthisDivision." | |||
Inotherwords,thosesystemswhichwereconstructed toClass2or3attheoptionoftheOwnerdonotfallunderthescopeofSectionXI,andtherefore arenotrequiredtobetestedtotheCodestandards. | |||
Thedieselairstartandfueloilsystemwerereviewedbyownerengineering evaluation toconfirmthattheclassification asQualityGroupCwasaresultofowneroptionalupgrade.Theevaluation concluded thatthiswasindeedthecasebasedondetaileddiscussion ofthequalitygroupratingsforthedieselgenerator auxiliary systemsinNUREG-0843, "SafetyEvaluation Reportrelatedtotheoperation ofSt.LuciePlant,UnitNo.2"(SE)October1981.Section9.5.4notesthatthecomponents areintentionally overdesignedandareconsidered equivalent toasystemdesignedtoASMEsectionIIIClass3requirements. | |||
FSARSection3.2.2alsostatesthat"Systemsimportant tosafetyandthecontainment boundaryareclassified inaccordance withANSIN18.2,..." | |||
Thedieselairstartandfueloilsystemsareclassified asSafetyClass3byANSIN18.2.Recognizing thatthesystemsareimportant tonuclearsafety,testingofthesafetyrelatedpumpsandvalvesisrequired. | |||
Appropriate testing'commensurate tothesystemssafetyfunctionhavebeenandwillcontinuetobeperformed, butnotunderthejurisdiction oftheASMEISTprogram.Thedieselairstartandfueloilsystemswillstillbemaintained totheQualityGroup3classification towhichtheyhavebeenupgradedto.RevisiontotheFSARhasbeenmadeasaresultoftheevaluation toreflecttheoptionalownerupgradestatusofthesesystems.ThoughtheFSARdesignbasesstatesthat"Thesystemservesnosafetyfunction...", | |||
aseparateevaluation oftheinstrument airsystemcouldnotconfirmthestatusforparticular valvesasanowneroptionalupgradetoQualityGroupBorCbasedonthedesignclassification requirements unrelated totheoverallsystemfunction. | |||
Therefore, thesequalitygroupBvalveswhichserveasafetyfunctionhavebeenincludedinthescopeofthecurrentISTprogramrevision. | |||
DuringthetimeinwhichthesevalvesdidnotappearintheISTprogramdocument, St.Luciecontinued totest thesevalvesbytheexistingplantprocedures atthefrequency andtotherequirements ofthecurrentISTprogram.TERSection5.2NRCRecommended Acti.on:TheISTProgram's scopewasreviewedforselectedsystems.ThepumpsandvalvesintheAuxiliary Feedwater System,MainSteam,ChemicalandVolumeControlSystemandComponent CoolingWaterSystemwerereviewedagainsttherequirements ofSectionXIandtheregulations. | |||
TheFSARwasusedtodetermine ifthespecified valvecategories andvalvefunctions wereconsistent withtheplant'ssafetyanalyses. | |||
Thereviewresultsshowedcompliance withtheCode,exceptforthefollowing items.ThelicenseeshouldreviewtheseitemsandmakechangestotheISTProgram,whereappropriate. | |||
Additionally, thelicenseeshouldverifythattherearenotsimilarproblemswiththeISTProgramforothersystems.St.LucieResponse: | |||
Thefunctions ofallQualityGroupA,B,andCvalveshaverecentlybeenreviewedtoupgradetheISTProgramsBasisDocumentation. | |||
ThisBasisDocumentation identifies andexplainswhyindividual valvesareincludedornotincludedintheISTProgram.TheFSARandotherplantdocuments wereusedinthisupgradetodetermine ifthespecified valvecategories andvalvefunctions warrantthevalvesinclusion intheISTProgram.Manyofthevalvesidentified havebeenincludedorexcludedfromtheISTProgramforoneofthefollowing reasons:1.Wheremultiplecomponents arecapableofperforming thesameequivalent andredundant specified function(eg.multiplevalvesclosinginseries)andwherethecomponents arenotsuppliedbyalternate andredundant powersupplies, onlyoneneedbeincludedintheprogram.Thecomponent mustbereliedupontoperformandnotsimplyhavethecapability ofperformance. | |||
Thisexemption onlyapplieswherelicensing documents donottakecreditforthedesignedredundancy. | |||
Components performing aredundant functionshallbeincludedinthetestingprogramif,intheprocessofanalysisorlicensing justification, theyarereliedupontobeoperable. | |||
2.Valvesinstalled primarily forthepurposeofproviding convenient operational flexibility (eg.systemcross-connects) thatarenotrequiredtooperate,assumingthatthedesignated first-line systemsandcomponents operatesatisfactorily, neednotbeincludedintheISTProgram.Thisdoesnotexcludeactivevalvesthatcouldbecalleduponasaresultofoptionalsystemlineupsexistingpriortotheinitiation ofanaccident. | |||
NRCRecommended Action: | |||
A. | A.Auxiliary Feedwater andMainSteamSystems-SincepartoftheAuxiliary Feedwater SystemisshownontheflowdiagramfortheMainSteamSystem,theresultsofthereviewforthesetwosystemsarepresented jointly.Thereference drawingsare:2998-G-080, Sheet2of2,Rev.18,"FlowDiagram-Feedwater 8Condensate Systems," | ||
TERSection5. | and2998-G-079, Sheet-1of6,Rev.16,"FlowDiagram-MainSteamSystem-SheetNo.1."Thefollowing itemswereidentified: | ||
1.Thelicenseeshouldreviewthebasisforincluding andexcluding lockedopenmanualvalvesintheProgram.Specifically, thefollowing lockedopenmanualvalveswhicharelocatedontheAFWdischarge linesupstreamofthesteamgenerators anddownstream ofnormallyclosedmotoroperatedvalvesareincludedintheprogram:2I-V-09120, 2I-V-09152, 2I-V-09136, and2I-V-09158 (Thelicenseeshouldnotethatthedrawingcoordinates areincorrectly listedintheprogramtablefortheabovevalves),whilethefollowing valveslocatedimmediately upstreamofthenormallyclosedmotoroperatedvalvesarenotincludedintheprogram:2I-V-09108,2I-V-09124, and2I-V-09140. | |||
(ThereareotherlockedopenmanualvalvesontheAFWpumps'ecirculation linestothecondensate storagetankandalsoonthepumps'uction lineswhicharenotincludedintheprogram)St.LucieResponse: | |||
LockedopenmanualvalvesareincludedintheProgramonlyiftheyarereliedupontoperformaspecificfunctioninshuttingdownthereactortothecoldshutdowncondition orinmitigating theconsequences ofanaccident. | |||
Plantemergency operating procedures directthattheAFWdischarge linemanualoperatedvalves:V-09120,V-09152,V-09136,andV-09158beclosedtoisolatetheaffectedsteamgenerator intheeventofasteamgenerator tuberupture.Thesevalvesarereliedupontoclosetocontroltheunrestricted releaseoffissionproductsandaretherefore includedintheprogram.Theprogramtablehasbeenrevisedtocorrectly listthedrawingcoordinates fortheabovevalves.NRCRecommended Action:2.Forthefollowing checkvalves,thelicenseeshouldverifythatthevalvesdonotperformasafetyfunctionintheclosedposition: | |||
2I-V-09252 and09294,steamgenerator feedwater linecheckvalvesinsidecontainment. | |||
2I-V-09107, 09119,09123,and09135,AFWpumps'ischarge linecheckvalvesdownstream ofnormallyclosedmotoroperatedvalves.2I-V-09139, 09151,and09157,AFWpumps'ischarge linecheckvalvesimmediately adjacenttopumpdischarge. | |||
St.LucieResponse: | |||
V-09252andV-09294:Isolation ofthesteamgenerators isprovidedbythemainfeedwater blockvalvesandauxiliary feedwater isolation valves,therefore closureofthesevalvesisnotrequired. | |||
V-09119,V-09135,V-'09151, andV-09157:Theonlyclosurefunctionistopreventreverseflowintheeventofapassivefailureoftheauxiliary feedwater headerupstreamofthesevalves.Thisisaredundant functiontothenormallyclosedauxiliary feedwater isolation motoroperatedvalves,MV-09-09throughMV-09-12whicharelocatedincloseproximity withinthequalitygroupBboundaryandarecreditedwithperforming thecontainment isolation functionaswell.Therefore, testingtheclosurefunctionofthesevalvesisnotrequired. | |||
V-09107,V-09123,andV-09139:Theauxiliary feedwater supplylinesareseparated bynormallyclosedcross-tie valves,closureofthesevalveisnotreliedupon.Thesevalveswouldonlyberequiredtocloseifisdesiredtofeedthe"2B"steamgenerator withthe"2A"auxiliary feedwater pump,orvice-versa. | |||
Sincetherearealreadytwoindependent, redundant AFWflowpathstoeachS/G,thisadditional flowpathisnotrequired. | |||
NRCRecommended Action:B.Component CoolingSystem-Thereference drawingforthissystemis2998-G-083, Rev.18,"FlowDiagramComponent CoolingSystem."Thefollowing itemswereidentified: | |||
1.Forthecomponent coolingsurgetank,diaphragm | |||
'operated ventvalve2-RCV-14-1, anditsaccompanying solenoidvalveRSE-14-1, ontopofthetankareshownasinterlocked onahighradiation signal,yetneithervalveislistedintheprogramtables.Thelicenseeshouldverifythatthesevalvesdonotperformasafetyfunction. | |||
St.LucieResponse: | |||
RCV-14-1: | |||
ThisqualitygroupD,threewayvalvenormallyventstheCCWsurgetanktoatmosphere. | |||
OnaCCWhighradiation signal,itshiftstoventthetanktothewastemanagement systemintheeventthatcomponent coolingpipinginsidecontainment isdamaged.SincepassivefailureoftheCCWpipinginsidecontainment isnotpostulated asaconsequence ofanaccidentand,ifitoccurred, thelikelyresultwouldbeleakageintothecontainment, testingofthisvalveisnotrequired. | |||
NRCRecommended Acti.on:2.CCWPumpssuctionanddischarge headerinter-tie valvesMV-14-1andMV-14-3areshownontheflowdiagramasnormallyclosedwhiletheprogramtablesindicatethatthenormalpositionisopen.Similarly, containment coolingunitssuctionanddischarge valves MV-14-9toMV-14-16areshownontheflowdiagramaslockedopenwhiletheprogramtablesindicateonlythatthenormalpositionisopen.Thelicenseeshouldreviseeitherthedrawingortheprogramtablesasappropriate. | |||
St.LucieResponse: | |||
TheCCWPumpssuctionanddischarge headerinter-tie valvesMV-14-1andMV-14-3andthecontainment coolingunitssuctionanddischarge valvesMV-14-9toMV-14-16havebeenremovedfromtheISTProgram.TheCCWpumpsuctionanddischarge headerinter-tie valvesMV-14-1andMV-14-3areopenedintheeventthateitherthe2Aor2BCCWpumpfails.The2Cpumpmaythenbealignedtothefailedpumpsheaderbyrepositioning, ifnecessary, theheaderinter-tie valves.Althoughthismaybe'animportant | |||
: function, itisnotexpectedtoberequiredduringanaccidentscenariosincetworedundant fullcapacitypumpsandessential headersareprovidedtoassureadequatecoolingcapacityifonesystemfails.Itisnotexpectedthatthe2Cpumpwouldberequiredtobealignedtothealternate headerduringanaccidentscenariounlessthesystemissubjected toseveralconcurrent activeandpassivefailures, therefore, testingisnotrequired. | |||
Thecontainment coolingunitssuctionanddischarge valvesMV-14-9toMV-14-16arelockedopentoprovidecontainment coolingduringaLOCA.Thisvalveisnotrequiredtocloseforcontainment isolation sincethecontainment fancoolersandassociated pipingformthecontainment boundary. | |||
NRCRecommended Action:C.ChemicalandVolumeControlSystem(CVCS).Thereference drawingsforthissystemwere:2998-G-078, Sheet120,Rev.ControlSystem(Sheet1)"2998-G-078, Sheet121,Rev.ControlSystem(Sheet2)"2998-G-078, Sheet122,Rev.ControlSystem(Sheet3)"4,"FlowDiagram-Chemical&Volume5,"FlowDiagram-Chemical&Volume5,"FlowDiagram-Chemical&VolumeThefollowing itemswereidentified: | |||
1.OnSheet2,checkvalvesV-2112(G-3),onthenitrogensupplylinetothevolumecontroltank(VCT),V-2188(F-5),ontheboricacidmakeupandprimarywatermakeupblendinglinetotheVCT,andV-2308(F-3),onthedischarge ofthechemicaladditionmeteringpump,formtheboundarybetweensafetyclassandnonsafetyclasspipingyetnoneofthethreevalvesareintheISTProgramforeitheranopenorclosetest.Thelicenseeshouldverifywhether7, thesevalvesshouldbeincludedintheprogram,andrevisetheprogram,asnecessary. | |||
St.LucieResponse: | |||
V-2112:ThisvalveopenstoadmithydrogengastomaintainablanketgasintheVCTduringnormaloperations ortoadmitnitrogengasduringmaintenance periodstocontrolRCSwaterchemistry. | |||
Neitherofthesefunctions arerequiredinshuttingdownareactortothecoldshutdowncondition orinmitigating theconsequences ofanaccident. | |||
FailureofthisvalvetoclosewouldnotdisabletheVCTbecausethegassupplylinepenetrates theVCTaboveitsnormaloperating levelthusnoinventory wouldbelost.V-2118:ThisvalveopensiftheSITsarealignedtotheVCTtoprovideboratedwatertomaintainRCSinventory duringplantcooldown. | |||
TheSIT/VCTintertieisrequiredforplantcooldownshouldatornadorendertheRWTandPWTinoperable. | |||
Duringanaccidentthischeckvalveclosestopreventconcentrated boricacidfrombeingbackfedintotheVCT.Thisfunctionisnotrequiredasitisredundant withthatofV-2501,VCTdischarge isolation valve.V-2308:Thisstop-check valveisonlyopenedwhileinjecting chemicals intotheCVCSsystem.Addingchemicals totheCVCSisamaintenance itemonly,anddoesnotperformaspecificfunctioninshuttingdownareactortothecoldshutdowncondition orinmitigating theconsequences ofanaccident. | |||
: Normally, V-2308isclosedusingitshandwheel topreventanybackflowintothenon-seismic chemicaladditionpiping.Inthisclosedposition, thevalveactsasapassiveisolation valveandtherefore doesnotrequiretesting.NRCRecommended Action:2.IntheFSAR,'jl9.3.4.3.2, reference ismadetoheat-traced pipingreliefvalveswhichareprovidedforthoseportionsoftheboricacidsystemthatareheattracedandcanbeisolatedindividually. | |||
Thevalvesrelievethemaximumfluidthermalexpansion ratethatwouldoccurifmaximumduplicate heattracingpowerwereinadvertently appliedtotheisolatedline.Thesevalvesappear'nSheet2asV-2171,V-2631,V-2632,V-2634,V-2636,V-2639,V-2641andV-2648.However,noneofthesevalvesisincludedintheISTProgram.Thelicenseeshouldverifywhetherthesevalvesshouldbeincludedintheprogram,andrevisetheprogram,asnecessary. | |||
St.LucieResponse: | |||
PSLrecentlyloweredtheboricacidconcentration requirements fortheboricacidmakeupsystem.Thischangeallowsfortheheattracingtobedeenergized thuseliminating theneedforthereliefvalvestoprotectthepipingfromthermalexpansion oftheboricacidsolution. | |||
Thesevalveshavebeenphysically removedfromthe CVCSsystem.Thesevalvesdonotappearonrevision16todrawing2998-G-078, Sheet121,"FlowDiagram-Chemical&VolumeControlSystem(Sheet2)".NRCRecommended Action:3.OnSheet2,checkvalvesV-2118andV-2674(bothF-4)areontheoutletlineoftheVCTleadingtothesuctionofthechargingpumpsandalsoupstreamoftheconnection fromtheboricacidmakeuppumps''discharge tothechargingpumps'uction. | |||
Althoughbothvalvesareincludedintheprogram,theyareonlytestedintheopenposition. | |||
Thelicenseeshouldverifywhetherthevalvesperformasafetyfunctionintheclosedpositionbypreventing backflowintotheVCTwhentheboricacidmakeuppumpsareinoperation, andrevisetheprogram,asnecessary. | |||
St.LucieResponse: | |||
V-2118andV-2674:ThesecheckvalvesarenotrequiredtoclosebecausetheVCTdischarge isolation valveV-2501canbeclosedfromthecontrolroomandautomatically closesonSIAStopreventconcentrated boricacidfrombeingbackfedintotheVCT.NRCRecommended Action:4.OnSheet2,checkvalveV-2191(E-3)isonalineleadingfromtherefueling watertank(RWT)tooutletlineoftheVCTwhichinturnleadstothechargingpumpsuction.ItappearsthatthisvalveopenstoallowthechargingpumpstoprovideborationoftheRCSusingtheRWTtoachieveshutdowncoolingconditions. | |||
Insuchacase,thenormallyclosedmotor-operated valveV-2504immediately upstreammustbeopensothatitdoesnotappearthatV-2504couldbereliedupontopreventreverseflow.AlthoughV-2191isintheProgram,itisonlytestedintheopenposition. | |||
ThelicenseeshouldverifywhetherV-2191performsasafetyfunctionintheclosedposition, bypreventing reverseflowfromothersourcessuchasthechemicaladditionmeteringpumpandthecontentsoftheVCT,andrevisetheprogram,asnecessary. | |||
St.LucieResponse: | |||
V-2191:Closureofthisvalveisnotrequiredasthisfunctionisprovidedbynormallyclosedisolation valve,V-2504.Additionally, ifV-2504wereopenandV-2191failedtocloseanyinventory divertedtotheRWTwouldstillbeavailable foremergency borationfromtheRWT.NRCRecommended Action:5.IntheFSAR,99.3.4.3.2, V-2435isdescribed asthecharginglinethermalreliefvalvewhichisaspringloadedcheckvalvedownstream oftheregenerative heatexchanger. | |||
Thevalveissized torelievethemaximumfluidthermalexpansion ratethatoccursifhotletdownflowcontinued afterchargingflowwasstoppedbyclosingthecharginglinedistribution valves.ThevalveappearsonSheet3(B-7).However,thevalveisnotincludedintheprogramforeitheranopenorclosetest.Thelicenseeshouldverifywhetherthisvalveshouldbeincludedintheprogram,andrevisetheprogram,asnecessary. | |||
St.LucieResponse: | |||
V-2435:Intheunlikelyeventthatthechargingheaderisisolatedandhotfluidcontinues, toflowthroughtheletdownsideoftheregenerative heatexchanger, thefluidinthechargingsideoftheheatexchanger wouldbesubjecttoexpansion. | |||
Undertheseconditions, thisvalveisdesignedtoopen,thusproviding thermalreliefprotection fortheheatexchanger andrelatedpiping.Duringanaccidentscenarioitisnotexpectedthatsuchconditions wouldexistnoristhisconsidered tobeasafetyfunction, thus,testingofthisvalvetoopenisnotrequired. | |||
Thevalveisnotrequiredtoclosetoperformasafetyfunction. | |||
Thisvalveisnotatahighpressure/low pressureinterface. | |||
Passivefailureof,upstreampipingisnotconsidered credibleasitisdesignedtooperateatpressures exceeding thenormalRCSpressure. | |||
Nosinglefailureofanyactivecomponent canoccurthatwoulddivertflowfromtheRCSthroughthechargingheaderifthisvalveweretofailtoclose.Containment isolation valveV-2523canalsobeclosedifrequired. | |||
Additionally atleastonechargingpumpwillbeavailable tosupplyflowthroughthisvalveduringanysinglefailurescenario. | |||
NRCRecommended Action:6.OnSheet3,checkvalvesV-2431(D-S),onthepressurizer auxiliary sprayline,andV-2432(C-8)andV-2433(B-S),onthecharginglineconnections totheRCS,arealllocatedinsidecontainment andappeartoformpartofthereactorcoolantpressureboundary(i.e.,formingtheboundarybetweenClass1andClass2piping).Althoughthevalvesareincludedintheprogram,theyareonlydesignated fortestingintheopenposition. | |||
Thelicenseeshouldverifywhetherthevalvesperformasafetyfunctionintheclosedposition, andrevisetheprogram,asnecessary. | |||
St.LucieResponse: | |||
V-2431,V-2432,V-2433:Thesevalvesarenotrequiredtoclosetoperformasafetyfunction. | |||
Thesevalvesarenotatahighpressure/low pressureinterface. | |||
Passivefailureofupstreampipingisnotconsidered credibleasitisdesignedtooperateatpressures exceeding thenormalRCSpressure. | |||
Nosinglefailureofanyactivecomponent canoccurthatwoulddivertflowfromtheRCSthroughthechargingheaderifthesevalvesweretofailtoclose.Isolation ValvesSE-02-1,SE-02-2,SE-02-3,SE-02-4andV-2523canalsobeclosedifrequired. | |||
Additionally atleastonecharging10 pumpwillbeavailable tosupplyflowthroughthisvalveduringanysinglefailurescenario. | |||
TERSection5.2NRCRecommended Action:(2ndste5.2)Asdiscussed intheTERevaluation fornumerousreliefrequests, specificportionsofOMa-1988, Parts6and10maybeutilizedwithoutrelief,providedallrelatedrequirements areimplemented. | |||
Approvalisrecommended pursuantto550.55a%(f)(4)(iv). | |||
TheuseofspecificportionsofPart6or10andanyrefueling outagejustifications should,however,bedocumented intheISTProgram.Implementation ofrelatedrequirements issubjecttoNRCinspection. | |||
St.LucieResponse: | |||
Thisactionitemisidentical toitem4.2oftheNRCSEissuedAugust23,1993.FPLresponded tothisactionitemintheresponsetothepreviousSE.TERSection5.3NRCRecommended Action:Section4.2oftheISTProgramstatesthatthevalvetestfrequency maybeextendedby25%,asallowedbytheTechnical Specifications. | |||
Theextension oftestintervals shouldnotbeappliidtosafetyandreliefvalvestestedinaccordance withtheintervals definedinSectionXI,becausetheTechnical Specifications donotaddressthesetestintervals. | |||
St.LucieResponse: | |||
Thisactionitemisidentical toitem4.3oftheNRCSEissuedAugust23,1993.FPLresponded tothisactionitemintheresponsetothepreviousSE.TERSection5.4NRCRecommended Action:InGenericPumpReliefRequestPR-2,thelicenseehasrequested reliefconcerning portableinstruments usedfortemperature andspeedmeasurement. | |||
Whenusingtemporary instruments, thelicenseeshouldensurethattheinstruments arecalibrated priortouseandaretraceable totheinservice testrecords.(TERSection2.1.2)St.LucieResponse: | |||
Thisactionitemisidentical toitem4.4oftheNRCSEissuedAugust23,1993.FPLresponded tothisactionitemintheresponsetothepreviousSE.11 0 | |||
TERSection5.5NRCRecommended Action:InPumpReliefRequestsPR-8,PR-ll,andPR-15,thelicenseeisproposing tocalculate pumpsuctionpressurebasedonmeasuring tankorinletstructure levels.Calculation ofinletpressurebasedonthemeasuredlevelprovidesanacceptable alternative methodofdetermining inletpressure, providedthecalculation isproperlyproceduralized, andtheaccuracyiswithintheaccuracyrequiredbytheCodeusingdirectmeasurement. | |||
Thisshouldbedocumented inthetestrecordsandbeavailable forreview.(TERSections2.2.1,2.3.1,2.4.1)St.LucieResponse: | |||
Thisactionitemisidentical toitem4.6oftheNRCSEissuedAugust23,1993.FPLresponded tothisactionitemin'theresponsetothepreviousSE.TERSection5.6NRCRecommended Action:InPumpReliefRequestsPR-12,PR-13,andPR-14,thelicenseehasrequested relieffromtheASMECode,SectionXl,11IWP-4520(b), | |||
whichrequiresthatthefrequency responserangeofthereadoutsystem(forinstruments usedtomeasurevibration amplitude) shallbefromone-halfminimumspeedtoatleastmaximumpumpshaftrotational speed.Specifically, inPR-12forthereactorcoolantchargingpumps,thecode-required frequency rangeis1.75Hzto3.5Hz.InPR-13fortheintakecoolingwaterpumps,thecode-required frequency rangeis7.38Hzto14.75Hz.InPR-14forthecontainment spraysystemhydrazine pumps,thecode-required frequency rangeis0.875Hzto1.75Hz.Thelicenseeclaimsthatinstruments satisfying theserangerequirements arecommercially unavailable, andthatthelowestavailable responsefrequency is10Hz.Thestaffhas,however,identified equipment withafrequency responserangelessthan10Hz.Thelicenseeshouldfurtherinvestigate theprocurement ofinstruments thatcomplywiththeCoderequirements. | |||
Also,thelicenseehasnotdiscussed therepeatability andaccuracyoftheinstruments tobeused.Thelicenseeshouldadditionally evaluateeachpumptodetermine ifthepumpsaresusceptible todegradation mechanisms thatresultinincreased vibration levelsatfrequencies lowerthan10Hz.Immediate imposition oftheCoderequirements isimpractical duetolimitations inthecurrentinstrumentation anditwouldbeanundueburdentorequiretheplanttodeclarethepumpsinoperable untiltheevaluation ofsubharmonic frequencies and/oravailable instrumentation couldbereviewed. | |||
Reliefwasrecommended foraninterimperiodofoneyearoruntilthenextrefueling outage,whichever islatertoperformtheevaluations intheAugust23,1993SE.Theinterimreliefremainsineffectintothesecondten-yearinterval. | |||
(TERSections2.2.2,2.3.2,2.4.2)12 St.LucieResponse: | |||
Thisactionitemisidentical toitem4.7oftheNRCSEissuedAugust23,1993.FPLresponded tothisactionitemintheresponsetothepreviousSE.TERSection5.7NRCRecommended Action:InPumpReliefRequestPR-17forthecontainment sprayhydrazine pumps,thelicenseeisproposing tomeasurepumpflowrateandvibration quarterly butnotalerttrendtheflowrate.Atrefueling, thepumpflowrateandvibration willbemeasured. | |||
Referring tothelicensee's request,itappearsthatthelicenseewillnottakeanycorrective actionsbasedontheflowratemeasuredquarterly exceeding thealertorrequiredactionvalues.Thelicenseeshouldevaluatetheestablishment ofrequiredactionrangesforquarterly testing.Thelicenseehasreferenced SectionXl11IWP-4150inthereliefrequest,howeverthelicenseehasnotdiscussed thepossibleuseofasymmetrical dampingdevicetoprovideforflowrateaveraging. | |||
Additionally, thelicenseehasnotdiscussed theimpactorburdenofinstalling flowinstrumentation thatcouldbeusedeffectively'or thequarterly test.Reference tothelicensee's AppendixA,pumpprogramtableindicates thatthelicenseewillnotmeasurethepumpinletpressureordifferential pressure. | |||
TheASME/ANSI CodeOMa-1988, Part6,Table3b,requiresthatpumpdischarge pressurebemeasuredforpositivedisplacement pumps.Thelicenseehasnotprovidedabasisfornotmeasuring pumpdifferential ordischarge pressure. | |||
Providedthelicenseedetermines thatthereisnopractical meansofinstalling flowinstrumentation thatisadequateforinservice testingpurposes, deferring flowratemeasurement torefueling outagesmaybeconsidered acceptable. | |||
Thelicenseeshouldevaluatetheprocurement ofdampingdevicesornewflowinstrumentation andmeasureandevaluatequarterly pumpdifferential ordischarge pressureaswellasvibration. | |||
Immediate imposition oftheCoderequirements isimpractical duetolackofadequateinstalled flowinstrumentation, anditwouldbeanundueburdentorequiretheplanttodeclarethesepumpsinoperable untiltheavailability ofnewinstrumentation couldbereviewed. | |||
Therefore, itisrecommended thatreliefbegrantedforaninterimperiodofoneyear,oruntilthenextrefueling outage,whichever islater.Theinterimreliefremainsineffectintothenextten-yearintervalduetobeginAugust9,1993.Intheinterim,thelicenseeshouldestablish acceptance criteriaforRPMversusflowratecorrelation andtakecorrective actionifneeded,andmeasuredischarge | |||
: pressure, ifpossible. | |||
(TERSection2.4.3)13 St.LucieResponse: | |||
Thisactionitemisidentical toitem4.8oftheNRCSEissuedAugust23,1993.FPLresponded tothisactionitemintheresponsetothepreviousSE.TERSection5.8NRCRecommended Action:InValveReliefRequestVR-13,thelicenseeisproposing todisassemble andinspectevery10yearseachofthefour12in.discharge linecheckvalvesinthelinesfromthesafetyinjection tankstothereactorcoolantsystem.Exercising closedistobeinaccordance withtheTechnical Specifications regarding pressureisolation valves(P1Vs).Disassembly andinspection shouldonlybeusediftestingwithflowisimpractical. | |||
Thelicenseeshouldprovideananalysisortestresultstoshowthatthenominal52secondsstroketimefortheSITdischarge isolation motor-operated valvestoopenistoolongtopermitsufficient flowtocausethecheckvalvestoreachtheirfull-open position. | |||
Ifafull-open positioncanbereached,thelicenseeshouldperformthetestwithflowtoconfirmdiskposition. | |||
Tosubstantiate theacceptability ofanyalternative technique forverifying thatthevalvesarefullyopen,licensees must,asaminimum,addressanddocumentcertainitemsintheISTprogram,asdescribed inPosition1.However,ifthelicenseedetermines thatfull-stroke exercising withflowisimpractical, thelicenseemay,asdiscussed bytheNRCinGenericLetterPosition2,performvalvedisassembly andinspection asapositivemeansofdetermining thatavalve'sdiskwillfull-stroke exerciseopenorofverifying closurecapability. | |||
Thelicenseeiscurrently proposing tomeetPosition2.Assurance ofproperreassembly willbeprovidedbyperforming aleaktestorpartial-flow testpriortoreturning avalvetoservicefollowing disassembly. | |||
However,thelicenseeintendstoinspecteachcheckvalveonlyonceinthe10yearInservice Inspection programinterval. | |||
AsdefinedinPosition2,inordertosupportextension ofthevalvedisassembly/inspection intervals tolongerthanonceevery6years,i.e.,incasesof"extremehardship," | |||
licensees shouldperformareviewoftheinstallation ofeachvalveaddressing the"EPRIApplications Guidelines forCheckValvesinNuclearPowerPlants"forproblematic locations. | |||
Thelicenseeshouldjustifytheextremehardship, including adiscussion onwhynon-int'rusive techniques cannotbeused.Additionally, thelicenseestatesthatvalveswillbeleaktestedorpartial-flow testedfollowing disassembly. | |||
Ifpossible, partialvalvestrokingquarterly orduringcoldshutdowns, orafterreassembly, mustbeperformed. | |||
ReliefisgrantedperGenericLetter89-04,Position1,tofull- | ReliefisgrantedperGenericLetter89-04,Position1,tofull-stroke exercisethevalvesopenwithlessthantheaccidentflowrate,providedallcriteriainPosition1aremet.Ifthelicenseedetermines thatfull-stroke exercising isimpractical, reliefisgrantedperPosition2todisassemble/inspect thesecheckvalves,providedthelicenseemeetsallthecriteriainPosition2,including reviewing theinstallation ofthevalves,demonstrating extremehardship, andpartial-stroke exercising following reassembly andatcoldshutdownifpractical. | ||
Withrespecttoexercising thevalveclosed,OMa-1988Part10,4.3.2.2allowsfull-stroke exercising thatisnotpracticable duringoperation orcoldshutdowntobedeferredtorefueling outages.RelieftousetheTechnical Specification requirements isnotrequiredpursuantto550.55a9(f)(4)(iv), | |||
providedthelicenseeimplements 94.3.2.2andallrelatedrequirements, including Part10,94.3.2.2(h) and96-2.Implementation oftheserelatedrequirements issubjecttoNRCinspection. | |||
(TERSection3.2.2)St.LucieResponse: | |||
Thisactionitemisidentical toitem4.9oftheNRCSEissuedAugust23,1993.FPLresponded tothisactionitemintheresponsetothepreviousSE.TERSection5.9NRCRecommended Action:InValveReliefRequestVR-14,thelicenseeisproposing topartial-stroke exerciseatcoldshutdowns andrefueling outagesthefour12in.safetyinjection checkvalveswhichopentoprovideflowpathsfrom0hesafetyinjection headerstotheRCSandclosetoisolatetheheadersfromthehighpressureofthereactorcoolantsystem.Thelicenseeshouldevaluateifthevalveswillachieveafull-open positionwiththeproposedreducedtestflowrateof3,000GPM.Ifafull-open positioncanbereached,thelicenseeshouldperformthetestingwithflow.Theuseofalternate techniques, suchasnon-intrusive techniques, toverifythatvalveswillfullyopenisacceptable, asdiscussed inGenericLetter89-04,Position1.Ifthevalvescannotbefull-stroke exercised, theNRCdefinedanacceptable alternative to'thefull-stroke exercising requirement inPosition2,whereinitisstatedthattheNRCstaffpositionisthatvalvedisassembly andinspection canbeusedasapositivemeansofdetermining thatavalve'sdiskwillfull-stroke exerciseopenorofverifying closurecapability. | |||
Thelicenseeiscurrently proposing tomeetPosition2.Assurance ofproperreassembly willbeprovidedbyperforming aleaktestorpartial-flow testpriortoreturning avalvetoservicefollowing disassembly. | |||
However,thelicenseeintendstoinspecteachcheck15 valveonlyonceinthe10yearinservice inspection programinterval. | |||
AsdefinedinPosition2,inordertosupportextension ofthevalvedisassembly/inspection intervals tolongerthanonceevery6years,i.e.,incasesof"extremehardship," | |||
licensees shouldperformareviewoftheinstallation ofeachvalveaddressing the"EPRIApplications Guidelines forCheckValvesinNuclearPowerPlants"forproblematic locations. | |||
Thelicenseeshouldalsoincludeadiscussion onwhynon-intrusive techniques cannotbeused.Additionally, thelicenseestatesthatthevalvewillbeleaktestedorpartial-flow testedfollowing disassembly. | |||
Position2requiresthat,ifpossible, partialvalvestrokingquarterly orduringcoldshutdowns, orafterreassembly, mustbeperformed. | |||
ReliefisgrantedperGenericLetter89-04,Position1,tofull-stroke exercisethevalvesopenwithlessthantheaccidentflowrate,providedallcriteriainPosition1aremet.Ifthelicenseedetermines thatfull-stroke exercising isimpractical, reliefisgrantedperPosition2todisassemble/inspect thesecheckvalves,providedthelicenseemeetsa'llthecriteriainPosition2,including reviewing theinstallation ofthevalves,demonstrating extremehardship, andpartial-stroke exercising following reassembly andatcoldshutdownifpractical. | |||
Withrespecttoexercising thevalveclosed,verification thatavalveisintheclosedpositioncanbedonebyvisualobservation, byanelectrical signalinitiated byaposition-indicating device,byobservation ofappropriate pressureindication inthesystem,byleaktesting,orbyotherpositive'eans. | |||
Thelicenseedoeshaveinstrumentation tocontinuously monitorupstreampressure. | |||
BasedontheTechnical Specifications, itappearsthatfollowing thepartial-stroke exerciseatcoldshutdowns, verification thatthevalveshaveclosedwillbeperformed andreliefwouldnotberequired. | |||
Thelicenseeshouldexercisethesevalvesclosedatcoldshutdowns orrevisetherequestaccordingly. | |||
(TERSection3.2.3)St.LucieResponse: | |||
Thisactionitemisidentical toitem4.10oftheNRCSEissuedAugust23,1993.FPLresponded tothisactionitemintheresponsetothepreviousSE.TERSection5.10NRCRecommended Action:ThelicenseestatesinVR-1thatvalvetestingneednotbeperformed moreoftenthanonceeverycoldshutdown, exceptasprovidedforinIWV-3417(a), | |||
whichrequiresmorefrequenttestingasaresultofdegradedstroketimes.TheASMEissuedaCodeinterpretation (Xl-1-92-41) thatstatesthatitistheintentofSectionXl,IWV-3410and3520,torequiretestingofvalveseverythreemonths,including duringextendedshutdownperiods,forvalvesotherthanthoseinsystemsdeclaredinoperable ornotV requiredtobeoperable(IWV-3416). | |||
Therefore, duringplantshutdownperiods,whenthevalvescanbeexercised, thelicenseeshouldexercisevalveseverythreemonthsinaccordance withtheCodeorprovideareliefrequest.Additionally, ifspecificvalvescannotbetestedduringanycoldshutdown(i.e.,dueto"thelackofplantconditions neededfortesting"), | |||
specificapprovalisrequiredtodefertesting.Thelicenseeshouldrevisethecoldshutdownjustifications, asrequired, todiscusstheconditions underwhichtestingcannotbeperformed duringanycoldshutdowns. | |||
St.LucieResponse: | |||
ReliefrequestVR-1hasbeenwithdrawn. | |||
OMa-1988, Part10,4.2.1.2(g)and4.3.2.2(g)havebeenauthorized forimplementation. | |||
Theprovision thatvalvetestingneednotbeperformed moreoftenthanonceeverycoldshutdownhasbeendeleted.Valvesthatcanbeexercised duringcoldshutdownperiodswillbeexercised everythreemonthsinaccordance withtheCodeortheywillbedeclaredoutofserviceuntilsuchtestingcanbecompleted. | |||
Theplantadministrative procedure governing ASMECodetesting,ofpumpsandvalvesstatesthefollowing: | |||
"Iftheunitremainsincoldshutdownforgreaterthan90days,thecoldshutdownvalvesshallbeexercised again.Plantstartupshouldnotbedelayedbecauseoftestingaslongasareasonable goodfaitheffortwasmade."TERSection5.11NRCRecommended Action:Forthefollowing checkvalves,thelicenseehasnotidentified anyclosedpositiontestingrequirement inthevalveprogramtable.Thelicenseeshouldreviewthesafetyfunctions ofthesevalvesandrevisetheprogram,ifnecessary: | |||
VR-5:VR-7'R-8'R-11: | |||
VR-21:VR-32:V-2177,2190,2191and2526V-07000andV-07001V-3401andV-3410V-3113,V-3133,V-3143andV-3766V-07129andV-07143V-3101St.LucieResponse: | |||
V-2177:Closureisnotrequiredasthisfunctionisprovidedbynormallyclosedisolation valve,V-2514.V-2190:Thereisnorequirement forthischeckvalvetocloseduringaSIAStopreventrecirculation oftheemergency borateflowbacktotheBAMTsorthesuctionoftherunningBAMpumps.Thisisbecauseanyleakagepastthevalvewouldbeavailable tothechargingpumpsthroughthegravityfeedline.17 V-2191:Closureisnotrequiredasthisfunctionisprovidedbynormallyclosedisolation valve,V-2504.Additionally, ifV-2504wereopenandV-2191failedtocloseanyinventory divertedtotheRWTwouldstillbeavailable foremergency borationfromtheRWT.V-2526:Thereisnosafetyrelatedrequirement forthisvalvetoclose.Theonlypositionthisvalveisrequiredtobeinduringanaccidentisopen,allowingboricacidtothesuctionofthechargingpumpsviatheboricacidmakeuppumpsorthegravityfeedlinesfromtheboricacidmakeuptanks.V-07000andV-07001:Closureisnotrequiredasthisfunctionisredundantly providedbytheLPSIpumpsuctionisolation valves.V-3401andV-3410:Closureisnotrequiredasthisfunctionisredundantly providedbythepumpdischarge checkvalves.V-3113,V-3133,V-3143andV-3766:Closureofthesevalvesisnotrequiredasthisfunctionisredundant totheHPSIheadermotoroperatedisolation valves.ThesevalvesarenotRCSpressureisolation valves.V-07129andV-07143:Closurefunctionisprovidedbythepumpsdischarge manualisolation valves(V-07130andV-07145)duringshutdowncooling.Thereisnosourceofbackflowinthecontainment spraymodeofoperation. | |||
V-3101:Sincethevalveisnormallyisolatedbyanupstreammanualisolation valve,exercising inthecloseddirection isnotrequired. | |||
TERSection5.12NRCRecommended Action:ForreliefrequestsVR-8,VR-10,VR-12,thelicenseestatesthatthealternate testingsatisfies therequirement ofGenericLetter89-04,Position1.Asdiscussed inPosition1,theNRCstaffpositionisthatpassingthemaximumrequiredaccidentcondition flowratethroughthevalveisanacceptable full-stroke. | |||
Itisassumedthatthefull-flow exerciseproposedbythelicenseecomplieswiththisposition. | |||
Ifothertechniques areused,suchasnon-intrusive techniques atreducedflowrate,thelicenseemustcomplywiththesixcriteriarequiredbyPosition1.Thelicenseeshouldclarifythisstatement ineachrequest.St.LucieResponse: | |||
ValvereliefrequestsVR-8,10and12havebeendeletedwiththejustifications fortesting'the valvesduringrefueling outagesnowdescribed inAppendixF:Refueling OutageJustifications. | |||
Thesevalvesarefullstrokedbypassingthemaximumrequiredaccidentcondition flowratethroughthevalves.OMa-1988, Part10,%4.3.2.2isusedtojustifydeferring thetestingtorefueling outages.18 TERSection5.13NRCRecommended Action:Thelicenseeshouldclarifywhythevalveprogramtablereferences VR-19whenitindicates thatV-3414andV-3427willbetestedclosedquarterly. | |||
St.LucieResponse: | |||
Thereference toVR-19hasbeenremovedfromthevalveprogramtableforvalvesV-3414andV-3427.TERSection5.14NRCRecommended Action:Thelicenseehasstatedthatthevalvesreferenced inVR-12"willbepartial-stroke exercised totheopenpositionandsubsequently strokedclosedduringcoldshutdowns perVR-1"andthebasisonlydiscusses theimpracticality oftestingquarterly. | |||
However,thevalveprogramtableidentifies thetestfrequency as"SP"asperVR-12andnot"CS",andthelicenseeadditionally statesthatthevalveswillbeverifiedclosedduringthePIVleaktests.Itisassumedthatthevalvesareexercised totheclosedpositioninaccordance withtheCodeduringcoldshutdowns, inadditiontothePIVleaktest.Ifexercising thevalvesclosedatcoldshutdowns isimpractical, therequest's basismustberevisedtodiscusstheimpracticality. | |||
St.LucieResponse: | |||
Thevalveprogramtablehasbeenrevisedtoindicatethatthevalvesaretobetestedclosedduringcoldshutdowns. | |||
Thebasisfortestingthesevalvesatcoldshutdowns isdescribed inAppendixE:ColdShutdownJustifications. | |||
TERSection5.15NRCRecommended Action:Fromareviewoftheapplicable flowdiagrams, 2998-G-078, Sheet130,Rev.4,andthecontinuation onflowdiagram2998-G-088, Rev.19,forvalvesV-3104andV-3105,itappearsthatthereisaflowelementoneachrecirculation line,i.e.,FE-03-1-1 andFE-03-2-1, whichcouldbeusedtomeasuretherecirculation lineflow.ThelicenseeshouldclarifywhytheseelementscannotbeusedinReliefRequestVR-28.Additionally, thelicenseeshouldexplainwhythequarterly LPSIpumpflowtestdoesnotresultinarecirculation flowsufficient tocausefull-stroke exercising ofthesevalves.OMa-1988Part10.%4-3-2-2allowsfull-stroke exercising thatisnotpracticable duringplantoperation orcoldshutdowns tobedeferredtorefueling outages.Therefore, providedthelicenseefurnishes information onwhytheinstalled flowelementsornon-intrusive techniques cannotbeusedtoverifythevalves'ull-stroke openquarterly, thereliefrequested bythelicenseeis19 coveredbytherulemaking, effective September 8,1992,asdescribed above,andapprovalcouldberecommended. | |||
However,ifquarterly full-stroke exercising ispractical, thelicenseemustcomplywiththeCoderequirements. | |||
Thelicenseeshouldrevisethereliefrequest.St.LucieResponse: | |||
FlowelementsFE-03-1-1 andFE-03-2-1 arestraponultrasonic flowinstruments designedtoannunciate lowflowalarmsinthecontrolroomtowarnoperators oflowflowconditions associated withtheLPSIpumps.Theultrasonic flowinstruments areusedexclusively toprovidelowflowalarms.TheflowelementsandalarmswereaddedtotheoriginaldesignoftheLPSIsystemtoaddressNRCquestions relatedtoECCSpumpoperation. | |||
Theinstruments weredesignedtoalerttheoperators topumplowflowconditions, butwereneverintendedtohavetheaccuracyneededtoquantifythedesignedflowrates fromthepumpthroughthecheckvalves.Actualpumprecirculation flowratesaresignificantly limitedbytheflowrestriction orificesineachrecirculation line.Actualflowrates asmeasuredbylevelincreases intheRWTovertimehaveproventobeonlyminimally greaterthanthe100gpmflowratethattheorificewasdesignedtoprovide.Sincetheorificeissuchamajorcontributor totheflowlossesinthelinewiththecheckvalveonlycontributing asmallportionoftheflowrestriction, ahighdegreeofaccuracyinflowmeasurement isneededtodetectdegradation ofthecheckvalves.StraponflowelementsofthenatureofFE-03-1-1 andFE-03-2-1 donothavetherequiredaccuracy. | |||
Usingtheacousticflowelementstoverifythecheckvalvesopenwouldbeimpractical. | |||
Theaccuracyofthestraponultrasonic devicesisquestionable forthisapplication andcouldunnecessarily placethecheckvalvesoutofserviceorpreventcheckvalvedegradation frombeingdetected. | |||
Thetestingdescribed intheprogramisadequatetoensurethecheckvalvesareperforming theirrequiredsafetyfunction. | |||
Precisemeasurements ofpumprecirculation flowratesareobtainedeachrefueling outagebymeasuring theRWTlevelincreaseovertimewhiledrainingthepressurizer orrefueling cavity.Duringthequarterly LPSIpumpruns,flowthroughtherecirculation linesisverifiedbydetermining thatheatisbeingremovedfromthepumps.Pumpheatremovalisthemajordesigncriteriafortherecirculation lines.Information fromthevalvemanufacturer statesthatflowvelocities of32.8ft/secarerequiredforthecheckvalvestoreachtheirfullopenposition. | |||
Duetotheflowreducingorifice,flowvelocities ofonlyabout10ft/seccanbeachieved. | |||
Thelackofsufficient flowtocausefull-stroke exercising ofthesevalvesmakestheuseofnon-intrusive techniques impractical. | |||
TERSection5.16NRCRecommended Action:20 | |||
Anomalies identified duringthereviewofcoldshutdownjustifications areidentified below:Thefollowing valvesarenotexercised closed.Thelicenseeshouldverifythatthevalvesdonotperformasafetyfunctionintheclosedposition, orrevisetheprogramasappropriate: | |||
RC-1:V-1460throughV-1466,reactorvesselandpressurizer gasvents;1in.normally-closed, solenoid-operated globevalves.RC-2:V-1474andV-1475,pressurizer power-operated reliefvalves;3in.solenoid-operated, normallyclosedglobevalves.CV-3.2:V-2431,auxiliary pressurizer spraycheckvalve;2in.normallyclosedcheckvalve.CV-3.3:V-2440,chargingpumpdischarge checkvalvetosafetyinjection; 2in.normallyclosedcheckvalve.Sl-l.l:V-3106andV-3107,LPSIpumpdischarge checkvalves;10in.normallyclosedcheckvalves.Sl-3.1:V-03002throughV-03005,Safetyinjection tank(SIT)drainlinecheckvalves;1in.normallyclosedcheckvalves.FW-1.2:V-09107,V-09123,andV-09139,auxiliary feedwater pumpdischarge checkvalves;4in.normallyclosedcheckvalves.FW-1.3:V-09119,V-09135,V-09151,andV-09157,auxiliary feedwater supplycheckvalves;4in.normallyclosedcheckvalves.CC-1.2:HCV-14-3A&B,shutdownheatexchanger returnvalves;14in.normallyopen,failopen,diaphragm-operated butterfly valves.St.LucieResponse: | |||
RC-1:V-1460throughV-1466:Testinginthecloseddirection isnotrequiredasthelossofreactorcoolantthroughtheone-inchlinesisjudgedinsignificant fromtheaspectofaccidentmitigation. | |||
Theselinesareequippedwithflowrestricting orificeslimitingthelossofcoolantliquidtowithinmakeupcapacity. | |||
RC-2:V-1474andV-1475:Closureis,notrequiredasthisfunctionisprovidedbythePORVblockvalves(V-1476andV-1477)whicharecreditedforisolating theassociated PORV.CV-3.2:V-2431:Thisvalveisnotrequiredtoclosetoperformasafetyfunction. | |||
Thisvalveisnotatahighpressure/low pressureinterface. | |||
Passivefailureofupstreampipingisnotconsidered credibleasitisdesignedtooperateatpressures exceeding thenormalRCSpressure. | |||
Nosinglefailureofanyactivecomponent canoccurthatwoulddivertflowfromtheRCSthroughthecharging21 | |||
headerifthisvalveweretofailtoclose. | headerifthisvalveweretofailtoclose.Isolation valvesSE-02-3andSE-02-4canalsobeclosedifrequired. | ||
Additional'ly atleastonechargingpumpwillbeavailable tosupplyflowthroughthisvalveduringanysinglefailurescenario. | |||
CV-3.3:V-2440:ClosureisnotrequiredsincethelineismanuallyisolatedbyvalveV-2340.V-2340isonlyopenedtoalignemergency borationflowfromthechargingpumpsthroughtheHPSIheaders.Underthiscondition V-2440isrequiredtoremainopenandhasnorequirement toclose.Sl-1.1:V-3106andV-3107:ThesevalvesarenotrequiredtoclosebecausetheLPSIpumpsareoperating orareisolatedfromadjoining systemsbyshutdowncoolingheatexchanger isolation valves,LPSIheaderisolation valves,andsafetyinjection headercheckvalvesduringanaccident. | |||
Thusclosuretestingisnotrequired. | |||
Sl-3.1:V-03002throughV-03005:ClosureisnotrequiredasthisfunctionisprovidedbyvalvesSE-03-1AthroughSE-03-1D. | |||
FW-1.2:V-09107,V-09123,andV-09139:ClosureisnotrequiredasthisfunctionisprovidedbyvalvesSE-09-2throughSE-09-5.(seeresponsetosection5.2.A.2). | |||
FW-1.3:V-09119,V-09135,V-09151,andV-09157:ClosureisnotrequiredasthisfunctionisprovidedbyvalvesMV-09-9throughMV-09-12andmanualvalvesV-09120,V-09136,V-09152,V-09158.(seeresponsetosection5.2.A.2)CC-1.2:HCV-14-3A&B:Thesevalvesareclosedduringnormaloperation todivertcomponent coolingwaterflowfromtheshutdowncoolingheatexchanger toothercomponents requiring coolingtosupportnormalpoweroperations. | |||
Thevalvesopenedtosupplycoolingwatertotheshutdowncoolingheatexchanger forplantcooldownorforcoolingcontainment spraypumpdischarge forcontainment cooling.Thereisnorequirement forthisvalvetocloseotherthantosupportnormalplantoperations whichisnotrequiredtomitigatetheconsequences ofanaccidentortoshutdowntheplant.NRCRecommended Action:CV-3.5:V-2523,charginglineisolation valve;2in.diaphragm-operated, lockedopenglobevalve.ForV-2523,thefailuremodeistheopenposition. | |||
Sincethevalveisonlyexercised totheclosedposition, thelicenseeshouldexplainwhynofailsafetesting(totheopenposition) isindicated inthevalveprogramtables.St.LucieResponse': | |||
22 Thisairoperated, failopenvalveislockedopentoallowboroninjection tothereactorcoolantsystem.Thisvalvemayberequiredtocloseshouldthealternate borationflowpathviatheHPSIheaderbeutilized, inwhichcasethevalvewouldnotberequiredtobereopened. | |||
Theabilityofthisvalvetostroketotheopenpositionortofailtotheopenpositionisnotasafetyrelatedfunctionandarenotrequiredtobetested.NRCRecommended Action:Sl-1.2:V-3463,Isolation ValveforSITTest/RWTReturnHeader;2in.manually-operated, lockedclosedgatevalve.According tothe.,flowdiagram,2998-G-078, Sheet'130, thetwooutboardcontainment isolation valvesforpenetration 41,2I-SE-03-2A and2B,arenormallyclosedandinparalleltoeachotherandinserieswithV-3463.TheValveProgramTablesindicatethatbothoftheoutboardvalvesareexercised openedquarterly. | |||
Furthermore, Technical Specification Table3.6-2forcontainment isolation valvesindicates thatV-3463istestableduringplantoperation. | |||
Therefore, thelicenseeshouldexplainwhyV-3463cannotbeexercised openquarterly. | |||
St.LucieResponse: | |||
Thejustifications fornottestingthisvalvequarterly hasbeenreviewedinresponsetothisSE.Thevalveprogramtablehasbeenrevisedtoindicatethatmanually-operated valveV-3463istobetestedquarterly. | |||
Thecoldshutdownjustification forthisvalvehasbeendeleted.NRCRecommended Action:Sl-2.1:V-3114,V-3124,V-3134,andV-3144,LPSIcoldleginjection checkvalves;6in.checkvalves,normallyclosed.Thelicenseehasnotprovidedan'explanation ofwhythevalvescannotbeverifiedclosedquarterly. | |||
Thereappeartobedrainortestconnections available bothimmediately upstreamandimmediately downstream ofeachofthesevalveswhichmaybeabletobeusedforbothaquarterly part-stroke opentestandaquarterly testforclosure.Therefore, thelicenseeshouldexplainwhysuchtestingcouldnotbeperformed quarterly. | |||
St.LucieResponse: | |||
Thejustification fornottestingthesevalvesquarterly hasbeenincludedinRevision1oftheSt.LucieUnit2ISTProgramSecondTenYearInterval. | |||
Thiscoldshutdownjustification statesthefollowing: | |||
"Duringnormalplantoperation, theLPSIPumpscannotdevelopsufficient discharge pressuretopumpthroughthesevalvestotheRCSandexercisethemintheopendirection. | |||
Theclosuretestscan23 onlybeperformed attheendoftheoutageafterthevalveshavebeenexercised openearlierbythepartialstrokeopentests."Thesearesimplecheckvalveswithnoexternalmeansofpositionindication. | |||
Tocyclethevalvesopenutilizing thedrainortestconnections upstreamanddownstream ofeachofthesevalvesduringnormalplantoperation isimpractical. | |||
Thedrainvalvedownstream ofthecheckvalvescannotbeopenedandusedasaflowpathforpartstrokingthecheckvalvesbecausetheyareexposedtothetotalvolumeandpressureoftheSIT.Theonlypractical meansofverifying closureisbyperforming aleaktestorbackflowtest.Thiswouldonlyconstitute avalidclosurestroketestofthevalvesonlyiftheycouldbeverifiedopenpriortothetest.Totestthecheckvalvesforclosuretheupstreamsideofthecheckvalvesmustbedepressurized anddrainedinordertocollectthebackleakagethroughthecheckvalves.Performing thistestrequiresaconsiderable effortsuchthattestingduringoperation wouldconstitute anunreasonable burdenontheplantstaff.Inaddition, thetestpersonnel musthandleuptoseveralgallonsofcontaminated waterpertest,someofwhichcouldbeunderpressurewhenfirstvented.Performing thistestprocedure eachquarterwouldresultinunnecessary personnel radiation exposures andpossiblepersonnel contaminations NRCRecommended Action:Sl-2.3:V-3545,V-3664,andV-3665,shutdowncoolingisolation andcrossconnectvalves,10in.motor-operated, lockedclosedgatevalves.ThelicenseeshouldexplainwhyafailureofV-3664andV-3665intheopenpositionwouldjeopardize theintegrity oftheLPSISystemsincetheShutdowncoolingsystemvalvesV-3480,V-3481,V-3651andV-3652areimmediately upstreamandinterlocked closedasdescribed forS1-2.2.Similarly, thelicenseeshoulddescribeunderwhatconditions thecrossconnectvalveV-3545isopenedduringtheshutdowncoolingmodeofoperation andalsojustifythatitsfailureduringnormalplantoperation wouldjeopardize theintegrity oftheLPSISystemsincetheitappearsthatonlyshutdowncoolingwouldbeaffectedandthatshutdowncoolingcouldstillbeaccomplished withthevalveopen.St.LucieResponse: | |||
Thejustifications fornottestingthesevalvesquarterly havebeenreviewedinresponsetothisSE.Thevalveprogramtablehasbeenrevisedtoindicatethatshutdowncoolingisolation valvesV-3664andV-3665aretobetestedquarterly. | |||
Thecoldshutdownjust).fication forthesevalveshasbeendeleted.a24 Therevisedjustification fornottestingshutdowncoolingcrossconnectvalveV-3545quarterly hasbeenincludedinRevision1oftheSt.LucieUnit2ISTProgramSecondTenYearInterval. | |||
Thiscoldshutdownjustification statesthefollowing: | |||
"Thebreakerforthisvalveisrequiredtobedeenergized'xcept duringplantcoldshutdownorrefueling modestomeetpositionC.1toRegulatory Guide1.63revision2.Thisistoprotectthemechanical integrity ofthevalveselectrical penetration assemblyshouldthemaximumshort-circuit vstimecondition occurgivensinglerandomfailureofcircuitoverloadprotection devices." | |||
NRCRecommended Action:MS-1.1:HCV-08-1A&B,mainsteamisolation valves;34in.normallyopen,piston-operated'globe valves.ThelicenseeshouldindicateintheTableswhatisthefailuremodepositionofthesevalves.St.LucieResponse: | |||
TheTableshavebeenrevisedtoindicatethatthefailuremodeofthemainsteamisolation valves,HCV-08-1A&B,istofailcloseinthecurrentrevisionoftheprogram.Thetablehasalsobeenrevisedtoindicatethatthevalvesaretobefailclosetestedduringthecoldshutdownclosestroketest.NRCRecommended Action:MS-1.2:V-08130andV-08163,steam-driven AFWpumpsteamsupplycheckvalves;4in.normallyopencheckvalves.Inthevalveprogramtables,thesecheckvalvesarepart-stroke exercised totheopenpositionquarterly, andfull-stroke exercised totheopenpositionatcoldshutdowns. | |||
ValvereliefrequestVR-31calledforpart-stroke exercising totheopenpositionmonthlyandfull-stroke exercising atcoldshutdowns. | |||
Thelicenseeshouldclarifytheapparentdiscrepancies inthetestingfrequencies. | |||
St.LucieResponse: | |||
ValvereliefrequestVR-31hasbeenrevisedtoindicatethatthepart-stroke exercising totheopenpositionofthesteam-driven AFWpumpsteamsupplycheckvalves,V-08130andV-08163,istobeperformed quarterly. | |||
25}} |
Revision as of 10:56, 29 June 2018
ML17309A807 | |
Person / Time | |
---|---|
Site: | Saint Lucie ![]() |
Issue date: | 12/04/1995 |
From: | SAGER D A FLORIDA POWER & LIGHT CO. |
To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
Shared Package | |
ML17228B347 | List: |
References | |
L-95-320, NUDOCS 9512110297 | |
Download: ML17309A807 (35) | |
Text
PRIGRITY3(ACCELERATED RIDSPROCI'.SSIiG REGULATORY INFORMATION DISTRIBUTION SYSTEM(RIDS)ACCESSION NBR:9512110297 DOC.DATE:
95/12/04NOTARIZED:
NODOCKETNFACIL:50-389 St.LuciePlant,Unit2,FloridaPower&LightCo.05000389AUTH.NAMEAUTHORAFFILIATION SAGER,D.A.
FloridaPower&LightCo.RECIP.NAME RECIPIENT AFFILIATION DocumentControlBranch(Document ControlDesk)
SUBJECT:
ForwardsRev0toPlantAdministrative Procedure 2-0010024, "Inservice TestingProgramforPumps&Valves."DISTRIBUTION CODE:A047DCOPIESRECEIVEDLTRENCLSIZE:TITLE:ORSubmittal:
Inservice/Testing/Relief fromASMCode-GL-89-04/NOTESRECIPIENT IDCODE/NAME PD2-1LANORRIS,JINTERNAL:
ACRS01EEMCBNUDOCS-ABSTRACT RES/DET/EMMEB EXTERNAL:
LITCOANDERSONNRCPDRCOPIESLTTRENCL111160111111111111RECIPIENT IDCODE/NAME PD2-1PDAEOD/SPD/RAB NRR/DE/ECGB NRR/DE/EMEB OGC/HDS3RES/DSIR/EIB NOACCOPIESLTTRENCL11111111101111NOTETOALL"RIDS"RECIPIENTS:
PLEASEHELPUSTOREDUCEiVKSTE!CONTACTI'IIEDOCL'i!ENT CONTROLDESk,ROOMPl.37(EXT.504.~0S3)TOELIXI!NATEYOL"RiAXILPl<OilDISTRIBUTION LISTSI'ORDOCLMEN'I'SYOL'ON"I'II~D!TOTALNUMBEROFCOPIESREQUIRED:
LTTR21ENCL14 FloridaPower&LightCompany,P.O.Box128,FortPierce,FL34954-0128 December4,1995r,-95-320 10CFR50.410CFR50.55aU.S.NuclearRegulatory Commission Attn:DocumentControlDeskWashington, D.C.20555RE:St.LucieUnit2DocketNo.50-389In-Service TestProgram-Revision2SecondTen-YearIntervalResonsetoSafetEvaluation 0enItemsOnMay2,1994,NRCissuedasafetyevaluation (SE)onthesecondten-yearintervalin-service test(IST)program,Revision0,forSt.LucieUnit2.IncludedwiththeNRCSEwasacopyoftheNRCcontractor's technical evaluation report(TER).Forcertainreliefrequests, implementation wasgranted,authorized, orapprovedasacceptable providedtheactionitemsoranomalies identified inSection5oftheTERwereaddressed withinoneyearofthedateoftheSEorbytheendofthenextrefueling outage,whicheverwaslater.Attachment 1providesaresponseorclarification toeachTERactionitem.Severaloftheitemsidentified intheTERwerepreviously addressed inRevision1oftheISTprogramwhichwassubmitted totheNRCbyFPLletterL-94-212datedAugust22,1994.ThisrevisionoftheUnit2secondten-yearintervalISTprogramhasbeenissuedasplantadministrative procedure, AP2-0010024 Revision0.Acopyofthisprocedure isenclosedforyourinformation.
Pleasecontactusifthereareanyquestions aboutthissubmittal.
Verytrulyyours,D.A.ViceSt.LgeresidentiePlantDAS/GRMcc:StewartD.Ebneter,RegionalAdministrator, RegionII,USNRCSeniorResidentInspector, USNRC,St.LuciePlantADGCKpgpp()pBp PDRanFPLGroupcompany h
St.LucieUnit2DocketNo.50-389In-Service TestProgram-Revision2SecondTen-YearIntervalResponsetoSafetyEvaluation OpenItemsIn-Service TestProgramRevision2SecondTen-YearIntervalResponsetoNRCSafetyEvaluation OpenItems12/04/95....
9512110297 BACKGROUND OnSeptember 15,1992,FPLletterL-92-247transmitted Revision2ofthefirstten-yearintervalISTprogramtotheNRC.Thisrevisionwasacompleterevisionoftheprogramtoincorporate theguidanceofGenericLetter89-04,Guidanceondeveloping Acceptable Inservice TestingPrograms.
OnAugust3,1993,FPLletterL-93-184transmitted Revision0ofthesecondten-yearintervalISTprogramtotheNRC.Thesecondten-yearintervalbeganonAugust8,,1993.OnAugust23,1993,NRCissuedthesafetyevaluation (SE)onRevision2ofthefirstten-yearintervalISTprogram.ThisSEincludedacopyoftheNRCcontractor's technical evaluation report(TER).Section4oftheTERincludedactionitemswhichtheNRCrequested FPLtoaddresswithinoneyearofthedateoftheSEorthenextrefueling outagewhicheverwaslater.OnAugust22,1994,FPLletterL-94-212transmitted Revision1ofthesecondten-yearintervalISTprogramtoaddressNRCopenitemsidentified intheAugust23,1993SEandNRCcontractor's TER.Theseopenitemswerecarriedforwardfromthefirstten-yearintervalISTprogram.OnMay2,1994,theNRCissuedtheSEforRevision0ofthesecondten-yearintervalISTprogram.IncludedwiththeNRCSEwasacopyoftheNRCcontractor's technical evaluation report(TER).Forcertainreliefrequests, implementation wasgranted,authorized, orapprovedasacceptable providedtheactionitemsoranomalies identified inSection5oftheTERwereaddressed withinoneyearofthedateoftheSEorbytheendofthenextrefueling outage,whicheverwaslater.Severaloftheseitemswerepreviously addressed inRevision1ofthesecondten-yearintervalISTprogram.Thissubmittal providesaresponsetotheremaining actionitemsandanomalies.
Therecommended actionsfromeachsubpartoftheTERSection5havebeenlistedbelowalongwiththeSt.Lucieresponse.
Foritemswhichduplicated openitemsfromtheAugust23,1993NRCSE,andwhichwerepreviously addressed inRevision1ofthesecondten-yearintervalISTprogramonlyacrossreference isprovided.
TERSection5.1NRCRecommended Action:TheISTProgramdoesnotincludeadescription of:howthecomponents wereselected, howtestingrequirements wereidentified foreachcomponent, orthesafetyfunctionofthevalves.Thereviewperformed forthisTERdidnotincludeverification thatallpumpsandvalveswithinthescopeof10CFR50.55aandSectionXIarecontained intheISTProgram,anddidnotensurethatall 0
applicable testingrequirements havebeenidentified.
Thelicenseeisrequested.to includethisinformation intheISTProgram.Theprogramshoulddescribethedevelopment process,suchasalistingofthedocuments used,themethodofthebasisforcategorizing valves,andthemethodorprocessusedformaintaining theprogramcurrentwithdesignmodifications orotheractivities performed under10CFR50.59.Additionally, foreachinterval, thelicenseeshouldmaintainanaccuratestatusofthereliefrequestsincluding theirrevisionandNRCapproval.
St.LucieResponse:
Thisaction"itemisidentical toitem4.1oftheNRCSEissuedAugust23,1993.FPLresponded tothisactionitemintheresponsetothepreviousSEandincorporated thechangesintoRevision1ofthesecondten-yearintervalISTprogramwhichwastransmitted byFPLletter,L-94-212datedAugust22,1994.NRCRecommended Action:Thelicenseehasdeletedthedieselairstartandfueloil,andinstrument airsystemfromtheISTProgram.ThelicenseeexplainsinthesummaryofchangesbetweenRevision2oftheFirstIntervaltoRevision0ofthe,SecondIntervalthatthesesystemsarenotrequiredtobebuilttoASMEClass1,2,or3standards perRegulatory Guide1.26,but"werebuilttoClassstandards attheoptionofFPL.Inaccordance withIWA-1300(e)
(sic),including thepumpsandvalvesinthesesystemsintheISTprogramwasattheoptionofFPLandnotarequirement.
Paragraph IWA-1320(e) statesthat"Ifsystemssafetycriteriapermitasystemtobenonnuclear safetyClassandanOwneroptionally classifies andconstructs thatsystem,oraportionthereof,toClass2or3requirements, theapplication oftherulesof(a)aboveisattheoptionoftheOwnerandisnotarequirement ofthisDivision."
Section3.2.2oftheFSAR,however,statesthatthedieselsystemsaresafety-related QualityGroupCcomponents andarerequiredtobebuilttoSectionIII,Class3requirements.
Components wereclassified pertheFSARinaccordance withANSIN18.2,aswellasRegulatory Guide1.26.Theregulations requirepumpsandvalvesclassified bytheOwnerasClass1,2,or3tobetestedinaccordance withSectionXI.Theregulations donotlimitthescopeoftheISTprogramtoonlythosesystemsdiscussed inRegulatory Guide1.26.TheISTprogramscopeshouldbeconsistent withtheclassification ofcomponents inthesafetyanalysisreport.TheISTProgramorFSARshouldberevisedaccordingly.
St.LucieResponse:
Thedieselairstartandfueloil,andinstrument airsystemswerepreviously intheISTprogrambecausetheywerebuiltandaremaintained toQualityGroupBandCrequirements.
Additionally, FSARTable3.2-1liststhedieselfueloilsystemasQualityGroupC(ASMEClass3).However,theseclassifications werepreviously considered asoptionalupgradessinceRegulatory Guide1.26doesnotrequirethesesystemstobeincludedinQualityGroupsA,B,orC.Regulatory Guide1.26isthegoverning documentforsystemQualityGroupclassifications sinceFSARSection3.2.2statesthat"Systemsafetyclassifications anddesignandfabrication requirements meettheintentofRegulatory Guide1.26,QualityGroupClassifications andStandards forWater-,Steam-,andRadioactive-Waste-Containing Components ofNuclearPowerPlants,February1976(R3)."ThesesystemsdonotrequiretestingpertheCodesinceParagraph IWA-1320.(e) statesthat"Ifsystemssafetycriteriapermitasystemtobenonnuclear safetyClassandanOwneroptionally classifies andconstructs thatsystem,oraportionthereof,toClass2or3requirements, theapplication oftherulesof(a)isattheoptionoftheOwnerandnotarequirement ofthisDivision."
Inotherwords,thosesystemswhichwereconstructed toClass2or3attheoptionoftheOwnerdonotfallunderthescopeofSectionXI,andtherefore arenotrequiredtobetestedtotheCodestandards.
Thedieselairstartandfueloilsystemwerereviewedbyownerengineering evaluation toconfirmthattheclassification asQualityGroupCwasaresultofowneroptionalupgrade.Theevaluation concluded thatthiswasindeedthecasebasedondetaileddiscussion ofthequalitygroupratingsforthedieselgenerator auxiliary systemsinNUREG-0843, "SafetyEvaluation Reportrelatedtotheoperation ofSt.LuciePlant,UnitNo.2"(SE)October1981.Section9.5.4notesthatthecomponents areintentionally overdesignedandareconsidered equivalent toasystemdesignedtoASMEsectionIIIClass3requirements.
FSARSection3.2.2alsostatesthat"Systemsimportant tosafetyandthecontainment boundaryareclassified inaccordance withANSIN18.2,..."
Thedieselairstartandfueloilsystemsareclassified asSafetyClass3byANSIN18.2.Recognizing thatthesystemsareimportant tonuclearsafety,testingofthesafetyrelatedpumpsandvalvesisrequired.
Appropriate testing'commensurate tothesystemssafetyfunctionhavebeenandwillcontinuetobeperformed, butnotunderthejurisdiction oftheASMEISTprogram.Thedieselairstartandfueloilsystemswillstillbemaintained totheQualityGroup3classification towhichtheyhavebeenupgradedto.RevisiontotheFSARhasbeenmadeasaresultoftheevaluation toreflecttheoptionalownerupgradestatusofthesesystems.ThoughtheFSARdesignbasesstatesthat"Thesystemservesnosafetyfunction...",
aseparateevaluation oftheinstrument airsystemcouldnotconfirmthestatusforparticular valvesasanowneroptionalupgradetoQualityGroupBorCbasedonthedesignclassification requirements unrelated totheoverallsystemfunction.
Therefore, thesequalitygroupBvalveswhichserveasafetyfunctionhavebeenincludedinthescopeofthecurrentISTprogramrevision.
DuringthetimeinwhichthesevalvesdidnotappearintheISTprogramdocument, St.Luciecontinued totest thesevalvesbytheexistingplantprocedures atthefrequency andtotherequirements ofthecurrentISTprogram.TERSection5.2NRCRecommended Acti.on:TheISTProgram's scopewasreviewedforselectedsystems.ThepumpsandvalvesintheAuxiliary Feedwater System,MainSteam,ChemicalandVolumeControlSystemandComponent CoolingWaterSystemwerereviewedagainsttherequirements ofSectionXIandtheregulations.
TheFSARwasusedtodetermine ifthespecified valvecategories andvalvefunctions wereconsistent withtheplant'ssafetyanalyses.
Thereviewresultsshowedcompliance withtheCode,exceptforthefollowing items.ThelicenseeshouldreviewtheseitemsandmakechangestotheISTProgram,whereappropriate.
Additionally, thelicenseeshouldverifythattherearenotsimilarproblemswiththeISTProgramforothersystems.St.LucieResponse:
Thefunctions ofallQualityGroupA,B,andCvalveshaverecentlybeenreviewedtoupgradetheISTProgramsBasisDocumentation.
ThisBasisDocumentation identifies andexplainswhyindividual valvesareincludedornotincludedintheISTProgram.TheFSARandotherplantdocuments wereusedinthisupgradetodetermine ifthespecified valvecategories andvalvefunctions warrantthevalvesinclusion intheISTProgram.Manyofthevalvesidentified havebeenincludedorexcludedfromtheISTProgramforoneofthefollowing reasons:1.Wheremultiplecomponents arecapableofperforming thesameequivalent andredundant specified function(eg.multiplevalvesclosinginseries)andwherethecomponents arenotsuppliedbyalternate andredundant powersupplies, onlyoneneedbeincludedintheprogram.Thecomponent mustbereliedupontoperformandnotsimplyhavethecapability ofperformance.
Thisexemption onlyapplieswherelicensing documents donottakecreditforthedesignedredundancy.
Components performing aredundant functionshallbeincludedinthetestingprogramif,intheprocessofanalysisorlicensing justification, theyarereliedupontobeoperable.
2.Valvesinstalled primarily forthepurposeofproviding convenient operational flexibility (eg.systemcross-connects) thatarenotrequiredtooperate,assumingthatthedesignated first-line systemsandcomponents operatesatisfactorily, neednotbeincludedintheISTProgram.Thisdoesnotexcludeactivevalvesthatcouldbecalleduponasaresultofoptionalsystemlineupsexistingpriortotheinitiation ofanaccident.
NRCRecommended Action:
A.Auxiliary Feedwater andMainSteamSystems-SincepartoftheAuxiliary Feedwater SystemisshownontheflowdiagramfortheMainSteamSystem,theresultsofthereviewforthesetwosystemsarepresented jointly.Thereference drawingsare:2998-G-080, Sheet2of2,Rev.18,"FlowDiagram-Feedwater 8Condensate Systems,"
and2998-G-079, Sheet-1of6,Rev.16,"FlowDiagram-MainSteamSystem-SheetNo.1."Thefollowing itemswereidentified:
1.Thelicenseeshouldreviewthebasisforincluding andexcluding lockedopenmanualvalvesintheProgram.Specifically, thefollowing lockedopenmanualvalveswhicharelocatedontheAFWdischarge linesupstreamofthesteamgenerators anddownstream ofnormallyclosedmotoroperatedvalvesareincludedintheprogram:2I-V-09120, 2I-V-09152, 2I-V-09136, and2I-V-09158 (Thelicenseeshouldnotethatthedrawingcoordinates areincorrectly listedintheprogramtablefortheabovevalves),whilethefollowing valveslocatedimmediately upstreamofthenormallyclosedmotoroperatedvalvesarenotincludedintheprogram:2I-V-09108,2I-V-09124, and2I-V-09140.
(ThereareotherlockedopenmanualvalvesontheAFWpumps'ecirculation linestothecondensate storagetankandalsoonthepumps'uction lineswhicharenotincludedintheprogram)St.LucieResponse:
LockedopenmanualvalvesareincludedintheProgramonlyiftheyarereliedupontoperformaspecificfunctioninshuttingdownthereactortothecoldshutdowncondition orinmitigating theconsequences ofanaccident.
Plantemergency operating procedures directthattheAFWdischarge linemanualoperatedvalves:V-09120,V-09152,V-09136,andV-09158beclosedtoisolatetheaffectedsteamgenerator intheeventofasteamgenerator tuberupture.Thesevalvesarereliedupontoclosetocontroltheunrestricted releaseoffissionproductsandaretherefore includedintheprogram.Theprogramtablehasbeenrevisedtocorrectly listthedrawingcoordinates fortheabovevalves.NRCRecommended Action:2.Forthefollowing checkvalves,thelicenseeshouldverifythatthevalvesdonotperformasafetyfunctionintheclosedposition:
2I-V-09252 and09294,steamgenerator feedwater linecheckvalvesinsidecontainment.
2I-V-09107, 09119,09123,and09135,AFWpumps'ischarge linecheckvalvesdownstream ofnormallyclosedmotoroperatedvalves.2I-V-09139, 09151,and09157,AFWpumps'ischarge linecheckvalvesimmediately adjacenttopumpdischarge.
St.LucieResponse:
V-09252andV-09294:Isolation ofthesteamgenerators isprovidedbythemainfeedwater blockvalvesandauxiliary feedwater isolation valves,therefore closureofthesevalvesisnotrequired.
V-09119,V-09135,V-'09151, andV-09157:Theonlyclosurefunctionistopreventreverseflowintheeventofapassivefailureoftheauxiliary feedwater headerupstreamofthesevalves.Thisisaredundant functiontothenormallyclosedauxiliary feedwater isolation motoroperatedvalves,MV-09-09throughMV-09-12whicharelocatedincloseproximity withinthequalitygroupBboundaryandarecreditedwithperforming thecontainment isolation functionaswell.Therefore, testingtheclosurefunctionofthesevalvesisnotrequired.
V-09107,V-09123,andV-09139:Theauxiliary feedwater supplylinesareseparated bynormallyclosedcross-tie valves,closureofthesevalveisnotreliedupon.Thesevalveswouldonlyberequiredtocloseifisdesiredtofeedthe"2B"steamgenerator withthe"2A"auxiliary feedwater pump,orvice-versa.
Sincetherearealreadytwoindependent, redundant AFWflowpathstoeachS/G,thisadditional flowpathisnotrequired.
NRCRecommended Action:B.Component CoolingSystem-Thereference drawingforthissystemis2998-G-083, Rev.18,"FlowDiagramComponent CoolingSystem."Thefollowing itemswereidentified:
1.Forthecomponent coolingsurgetank,diaphragm
'operated ventvalve2-RCV-14-1, anditsaccompanying solenoidvalveRSE-14-1, ontopofthetankareshownasinterlocked onahighradiation signal,yetneithervalveislistedintheprogramtables.Thelicenseeshouldverifythatthesevalvesdonotperformasafetyfunction.
St.LucieResponse:
RCV-14-1:
ThisqualitygroupD,threewayvalvenormallyventstheCCWsurgetanktoatmosphere.
OnaCCWhighradiation signal,itshiftstoventthetanktothewastemanagement systemintheeventthatcomponent coolingpipinginsidecontainment isdamaged.SincepassivefailureoftheCCWpipinginsidecontainment isnotpostulated asaconsequence ofanaccidentand,ifitoccurred, thelikelyresultwouldbeleakageintothecontainment, testingofthisvalveisnotrequired.
NRCRecommended Acti.on:2.CCWPumpssuctionanddischarge headerinter-tie valvesMV-14-1andMV-14-3areshownontheflowdiagramasnormallyclosedwhiletheprogramtablesindicatethatthenormalpositionisopen.Similarly, containment coolingunitssuctionanddischarge valves MV-14-9toMV-14-16areshownontheflowdiagramaslockedopenwhiletheprogramtablesindicateonlythatthenormalpositionisopen.Thelicenseeshouldreviseeitherthedrawingortheprogramtablesasappropriate.
St.LucieResponse:
TheCCWPumpssuctionanddischarge headerinter-tie valvesMV-14-1andMV-14-3andthecontainment coolingunitssuctionanddischarge valvesMV-14-9toMV-14-16havebeenremovedfromtheISTProgram.TheCCWpumpsuctionanddischarge headerinter-tie valvesMV-14-1andMV-14-3areopenedintheeventthateitherthe2Aor2BCCWpumpfails.The2Cpumpmaythenbealignedtothefailedpumpsheaderbyrepositioning, ifnecessary, theheaderinter-tie valves.Althoughthismaybe'animportant
- function, itisnotexpectedtoberequiredduringanaccidentscenariosincetworedundant fullcapacitypumpsandessential headersareprovidedtoassureadequatecoolingcapacityifonesystemfails.Itisnotexpectedthatthe2Cpumpwouldberequiredtobealignedtothealternate headerduringanaccidentscenariounlessthesystemissubjected toseveralconcurrent activeandpassivefailures, therefore, testingisnotrequired.
Thecontainment coolingunitssuctionanddischarge valvesMV-14-9toMV-14-16arelockedopentoprovidecontainment coolingduringaLOCA.Thisvalveisnotrequiredtocloseforcontainment isolation sincethecontainment fancoolersandassociated pipingformthecontainment boundary.
NRCRecommended Action:C.ChemicalandVolumeControlSystem(CVCS).Thereference drawingsforthissystemwere:2998-G-078, Sheet120,Rev.ControlSystem(Sheet1)"2998-G-078, Sheet121,Rev.ControlSystem(Sheet2)"2998-G-078, Sheet122,Rev.ControlSystem(Sheet3)"4,"FlowDiagram-Chemical&Volume5,"FlowDiagram-Chemical&Volume5,"FlowDiagram-Chemical&VolumeThefollowing itemswereidentified:
1.OnSheet2,checkvalvesV-2112(G-3),onthenitrogensupplylinetothevolumecontroltank(VCT),V-2188(F-5),ontheboricacidmakeupandprimarywatermakeupblendinglinetotheVCT,andV-2308(F-3),onthedischarge ofthechemicaladditionmeteringpump,formtheboundarybetweensafetyclassandnonsafetyclasspipingyetnoneofthethreevalvesareintheISTProgramforeitheranopenorclosetest.Thelicenseeshouldverifywhether7, thesevalvesshouldbeincludedintheprogram,andrevisetheprogram,asnecessary.
St.LucieResponse:
V-2112:ThisvalveopenstoadmithydrogengastomaintainablanketgasintheVCTduringnormaloperations ortoadmitnitrogengasduringmaintenance periodstocontrolRCSwaterchemistry.
Neitherofthesefunctions arerequiredinshuttingdownareactortothecoldshutdowncondition orinmitigating theconsequences ofanaccident.
FailureofthisvalvetoclosewouldnotdisabletheVCTbecausethegassupplylinepenetrates theVCTaboveitsnormaloperating levelthusnoinventory wouldbelost.V-2118:ThisvalveopensiftheSITsarealignedtotheVCTtoprovideboratedwatertomaintainRCSinventory duringplantcooldown.
TheSIT/VCTintertieisrequiredforplantcooldownshouldatornadorendertheRWTandPWTinoperable.
Duringanaccidentthischeckvalveclosestopreventconcentrated boricacidfrombeingbackfedintotheVCT.Thisfunctionisnotrequiredasitisredundant withthatofV-2501,VCTdischarge isolation valve.V-2308:Thisstop-check valveisonlyopenedwhileinjecting chemicals intotheCVCSsystem.Addingchemicals totheCVCSisamaintenance itemonly,anddoesnotperformaspecificfunctioninshuttingdownareactortothecoldshutdowncondition orinmitigating theconsequences ofanaccident.
- Normally, V-2308isclosedusingitshandwheel topreventanybackflowintothenon-seismic chemicaladditionpiping.Inthisclosedposition, thevalveactsasapassiveisolation valveandtherefore doesnotrequiretesting.NRCRecommended Action:2.IntheFSAR,'jl9.3.4.3.2, reference ismadetoheat-traced pipingreliefvalveswhichareprovidedforthoseportionsoftheboricacidsystemthatareheattracedandcanbeisolatedindividually.
Thevalvesrelievethemaximumfluidthermalexpansion ratethatwouldoccurifmaximumduplicate heattracingpowerwereinadvertently appliedtotheisolatedline.Thesevalvesappear'nSheet2asV-2171,V-2631,V-2632,V-2634,V-2636,V-2639,V-2641andV-2648.However,noneofthesevalvesisincludedintheISTProgram.Thelicenseeshouldverifywhetherthesevalvesshouldbeincludedintheprogram,andrevisetheprogram,asnecessary.
St.LucieResponse:
PSLrecentlyloweredtheboricacidconcentration requirements fortheboricacidmakeupsystem.Thischangeallowsfortheheattracingtobedeenergized thuseliminating theneedforthereliefvalvestoprotectthepipingfromthermalexpansion oftheboricacidsolution.
Thesevalveshavebeenphysically removedfromthe CVCSsystem.Thesevalvesdonotappearonrevision16todrawing2998-G-078, Sheet121,"FlowDiagram-Chemical&VolumeControlSystem(Sheet2)".NRCRecommended Action:3.OnSheet2,checkvalvesV-2118andV-2674(bothF-4)areontheoutletlineoftheVCTleadingtothesuctionofthechargingpumpsandalsoupstreamoftheconnection fromtheboricacidmakeuppumpsdischarge tothechargingpumps'uction.
Althoughbothvalvesareincludedintheprogram,theyareonlytestedintheopenposition.
Thelicenseeshouldverifywhetherthevalvesperformasafetyfunctionintheclosedpositionbypreventing backflowintotheVCTwhentheboricacidmakeuppumpsareinoperation, andrevisetheprogram,asnecessary.
St.LucieResponse:
V-2118andV-2674:ThesecheckvalvesarenotrequiredtoclosebecausetheVCTdischarge isolation valveV-2501canbeclosedfromthecontrolroomandautomatically closesonSIAStopreventconcentrated boricacidfrombeingbackfedintotheVCT.NRCRecommended Action:4.OnSheet2,checkvalveV-2191(E-3)isonalineleadingfromtherefueling watertank(RWT)tooutletlineoftheVCTwhichinturnleadstothechargingpumpsuction.ItappearsthatthisvalveopenstoallowthechargingpumpstoprovideborationoftheRCSusingtheRWTtoachieveshutdowncoolingconditions.
Insuchacase,thenormallyclosedmotor-operated valveV-2504immediately upstreammustbeopensothatitdoesnotappearthatV-2504couldbereliedupontopreventreverseflow.AlthoughV-2191isintheProgram,itisonlytestedintheopenposition.
ThelicenseeshouldverifywhetherV-2191performsasafetyfunctionintheclosedposition, bypreventing reverseflowfromothersourcessuchasthechemicaladditionmeteringpumpandthecontentsoftheVCT,andrevisetheprogram,asnecessary.
St.LucieResponse:
V-2191:Closureofthisvalveisnotrequiredasthisfunctionisprovidedbynormallyclosedisolation valve,V-2504.Additionally, ifV-2504wereopenandV-2191failedtocloseanyinventory divertedtotheRWTwouldstillbeavailable foremergency borationfromtheRWT.NRCRecommended Action:5.IntheFSAR,99.3.4.3.2, V-2435isdescribed asthecharginglinethermalreliefvalvewhichisaspringloadedcheckvalvedownstream oftheregenerative heatexchanger.
Thevalveissized torelievethemaximumfluidthermalexpansion ratethatoccursifhotletdownflowcontinued afterchargingflowwasstoppedbyclosingthecharginglinedistribution valves.ThevalveappearsonSheet3(B-7).However,thevalveisnotincludedintheprogramforeitheranopenorclosetest.Thelicenseeshouldverifywhetherthisvalveshouldbeincludedintheprogram,andrevisetheprogram,asnecessary.
St.LucieResponse:
V-2435:Intheunlikelyeventthatthechargingheaderisisolatedandhotfluidcontinues, toflowthroughtheletdownsideoftheregenerative heatexchanger, thefluidinthechargingsideoftheheatexchanger wouldbesubjecttoexpansion.
Undertheseconditions, thisvalveisdesignedtoopen,thusproviding thermalreliefprotection fortheheatexchanger andrelatedpiping.Duringanaccidentscenarioitisnotexpectedthatsuchconditions wouldexistnoristhisconsidered tobeasafetyfunction, thus,testingofthisvalvetoopenisnotrequired.
Thevalveisnotrequiredtoclosetoperformasafetyfunction.
Thisvalveisnotatahighpressure/low pressureinterface.
Passivefailureof,upstreampipingisnotconsidered credibleasitisdesignedtooperateatpressures exceeding thenormalRCSpressure.
Nosinglefailureofanyactivecomponent canoccurthatwoulddivertflowfromtheRCSthroughthechargingheaderifthisvalveweretofailtoclose.Containment isolation valveV-2523canalsobeclosedifrequired.
Additionally atleastonechargingpumpwillbeavailable tosupplyflowthroughthisvalveduringanysinglefailurescenario.
NRCRecommended Action:6.OnSheet3,checkvalvesV-2431(D-S),onthepressurizer auxiliary sprayline,andV-2432(C-8)andV-2433(B-S),onthecharginglineconnections totheRCS,arealllocatedinsidecontainment andappeartoformpartofthereactorcoolantpressureboundary(i.e.,formingtheboundarybetweenClass1andClass2piping).Althoughthevalvesareincludedintheprogram,theyareonlydesignated fortestingintheopenposition.
Thelicenseeshouldverifywhetherthevalvesperformasafetyfunctionintheclosedposition, andrevisetheprogram,asnecessary.
St.LucieResponse:
V-2431,V-2432,V-2433:Thesevalvesarenotrequiredtoclosetoperformasafetyfunction.
Thesevalvesarenotatahighpressure/low pressureinterface.
Passivefailureofupstreampipingisnotconsidered credibleasitisdesignedtooperateatpressures exceeding thenormalRCSpressure.
Nosinglefailureofanyactivecomponent canoccurthatwoulddivertflowfromtheRCSthroughthechargingheaderifthesevalvesweretofailtoclose.Isolation ValvesSE-02-1,SE-02-2,SE-02-3,SE-02-4andV-2523canalsobeclosedifrequired.
Additionally atleastonecharging10 pumpwillbeavailable tosupplyflowthroughthisvalveduringanysinglefailurescenario.
TERSection5.2NRCRecommended Action:(2ndste5.2)Asdiscussed intheTERevaluation fornumerousreliefrequests, specificportionsofOMa-1988, Parts6and10maybeutilizedwithoutrelief,providedallrelatedrequirements areimplemented.
Approvalisrecommended pursuantto550.55a%(f)(4)(iv).
TheuseofspecificportionsofPart6or10andanyrefueling outagejustifications should,however,bedocumented intheISTProgram.Implementation ofrelatedrequirements issubjecttoNRCinspection.
St.LucieResponse:
Thisactionitemisidentical toitem4.2oftheNRCSEissuedAugust23,1993.FPLresponded tothisactionitemintheresponsetothepreviousSE.TERSection5.3NRCRecommended Action:Section4.2oftheISTProgramstatesthatthevalvetestfrequency maybeextendedby25%,asallowedbytheTechnical Specifications.
Theextension oftestintervals shouldnotbeappliidtosafetyandreliefvalvestestedinaccordance withtheintervals definedinSectionXI,becausetheTechnical Specifications donotaddressthesetestintervals.
St.LucieResponse:
Thisactionitemisidentical toitem4.3oftheNRCSEissuedAugust23,1993.FPLresponded tothisactionitemintheresponsetothepreviousSE.TERSection5.4NRCRecommended Action:InGenericPumpReliefRequestPR-2,thelicenseehasrequested reliefconcerning portableinstruments usedfortemperature andspeedmeasurement.
Whenusingtemporary instruments, thelicenseeshouldensurethattheinstruments arecalibrated priortouseandaretraceable totheinservice testrecords.(TERSection2.1.2)St.LucieResponse:
Thisactionitemisidentical toitem4.4oftheNRCSEissuedAugust23,1993.FPLresponded tothisactionitemintheresponsetothepreviousSE.11 0
TERSection5.5NRCRecommended Action:InPumpReliefRequestsPR-8,PR-ll,andPR-15,thelicenseeisproposing tocalculate pumpsuctionpressurebasedonmeasuring tankorinletstructure levels.Calculation ofinletpressurebasedonthemeasuredlevelprovidesanacceptable alternative methodofdetermining inletpressure, providedthecalculation isproperlyproceduralized, andtheaccuracyiswithintheaccuracyrequiredbytheCodeusingdirectmeasurement.
Thisshouldbedocumented inthetestrecordsandbeavailable forreview.(TERSections2.2.1,2.3.1,2.4.1)St.LucieResponse:
Thisactionitemisidentical toitem4.6oftheNRCSEissuedAugust23,1993.FPLresponded tothisactionitemin'theresponsetothepreviousSE.TERSection5.6NRCRecommended Action:InPumpReliefRequestsPR-12,PR-13,andPR-14,thelicenseehasrequested relieffromtheASMECode,SectionXl,11IWP-4520(b),
whichrequiresthatthefrequency responserangeofthereadoutsystem(forinstruments usedtomeasurevibration amplitude) shallbefromone-halfminimumspeedtoatleastmaximumpumpshaftrotational speed.Specifically, inPR-12forthereactorcoolantchargingpumps,thecode-required frequency rangeis1.75Hzto3.5Hz.InPR-13fortheintakecoolingwaterpumps,thecode-required frequency rangeis7.38Hzto14.75Hz.InPR-14forthecontainment spraysystemhydrazine pumps,thecode-required frequency rangeis0.875Hzto1.75Hz.Thelicenseeclaimsthatinstruments satisfying theserangerequirements arecommercially unavailable, andthatthelowestavailable responsefrequency is10Hz.Thestaffhas,however,identified equipment withafrequency responserangelessthan10Hz.Thelicenseeshouldfurtherinvestigate theprocurement ofinstruments thatcomplywiththeCoderequirements.
Also,thelicenseehasnotdiscussed therepeatability andaccuracyoftheinstruments tobeused.Thelicenseeshouldadditionally evaluateeachpumptodetermine ifthepumpsaresusceptible todegradation mechanisms thatresultinincreased vibration levelsatfrequencies lowerthan10Hz.Immediate imposition oftheCoderequirements isimpractical duetolimitations inthecurrentinstrumentation anditwouldbeanundueburdentorequiretheplanttodeclarethepumpsinoperable untiltheevaluation ofsubharmonic frequencies and/oravailable instrumentation couldbereviewed.
Reliefwasrecommended foraninterimperiodofoneyearoruntilthenextrefueling outage,whichever islatertoperformtheevaluations intheAugust23,1993SE.Theinterimreliefremainsineffectintothesecondten-yearinterval.
(TERSections2.2.2,2.3.2,2.4.2)12 St.LucieResponse:
Thisactionitemisidentical toitem4.7oftheNRCSEissuedAugust23,1993.FPLresponded tothisactionitemintheresponsetothepreviousSE.TERSection5.7NRCRecommended Action:InPumpReliefRequestPR-17forthecontainment sprayhydrazine pumps,thelicenseeisproposing tomeasurepumpflowrateandvibration quarterly butnotalerttrendtheflowrate.Atrefueling, thepumpflowrateandvibration willbemeasured.
Referring tothelicensee's request,itappearsthatthelicenseewillnottakeanycorrective actionsbasedontheflowratemeasuredquarterly exceeding thealertorrequiredactionvalues.Thelicenseeshouldevaluatetheestablishment ofrequiredactionrangesforquarterly testing.Thelicenseehasreferenced SectionXl11IWP-4150inthereliefrequest,howeverthelicenseehasnotdiscussed thepossibleuseofasymmetrical dampingdevicetoprovideforflowrateaveraging.
Additionally, thelicenseehasnotdiscussed theimpactorburdenofinstalling flowinstrumentation thatcouldbeusedeffectively'or thequarterly test.Reference tothelicensee's AppendixA,pumpprogramtableindicates thatthelicenseewillnotmeasurethepumpinletpressureordifferential pressure.
TheASME/ANSI CodeOMa-1988, Part6,Table3b,requiresthatpumpdischarge pressurebemeasuredforpositivedisplacement pumps.Thelicenseehasnotprovidedabasisfornotmeasuring pumpdifferential ordischarge pressure.
Providedthelicenseedetermines thatthereisnopractical meansofinstalling flowinstrumentation thatisadequateforinservice testingpurposes, deferring flowratemeasurement torefueling outagesmaybeconsidered acceptable.
Thelicenseeshouldevaluatetheprocurement ofdampingdevicesornewflowinstrumentation andmeasureandevaluatequarterly pumpdifferential ordischarge pressureaswellasvibration.
Immediate imposition oftheCoderequirements isimpractical duetolackofadequateinstalled flowinstrumentation, anditwouldbeanundueburdentorequiretheplanttodeclarethesepumpsinoperable untiltheavailability ofnewinstrumentation couldbereviewed.
Therefore, itisrecommended thatreliefbegrantedforaninterimperiodofoneyear,oruntilthenextrefueling outage,whichever islater.Theinterimreliefremainsineffectintothenextten-yearintervalduetobeginAugust9,1993.Intheinterim,thelicenseeshouldestablish acceptance criteriaforRPMversusflowratecorrelation andtakecorrective actionifneeded,andmeasuredischarge
- pressure, ifpossible.
(TERSection2.4.3)13 St.LucieResponse:
Thisactionitemisidentical toitem4.8oftheNRCSEissuedAugust23,1993.FPLresponded tothisactionitemintheresponsetothepreviousSE.TERSection5.8NRCRecommended Action:InValveReliefRequestVR-13,thelicenseeisproposing todisassemble andinspectevery10yearseachofthefour12in.discharge linecheckvalvesinthelinesfromthesafetyinjection tankstothereactorcoolantsystem.Exercising closedistobeinaccordance withtheTechnical Specifications regarding pressureisolation valves(P1Vs).Disassembly andinspection shouldonlybeusediftestingwithflowisimpractical.
Thelicenseeshouldprovideananalysisortestresultstoshowthatthenominal52secondsstroketimefortheSITdischarge isolation motor-operated valvestoopenistoolongtopermitsufficient flowtocausethecheckvalvestoreachtheirfull-open position.
Ifafull-open positioncanbereached,thelicenseeshouldperformthetestwithflowtoconfirmdiskposition.
Tosubstantiate theacceptability ofanyalternative technique forverifying thatthevalvesarefullyopen,licensees must,asaminimum,addressanddocumentcertainitemsintheISTprogram,asdescribed inPosition1.However,ifthelicenseedetermines thatfull-stroke exercising withflowisimpractical, thelicenseemay,asdiscussed bytheNRCinGenericLetterPosition2,performvalvedisassembly andinspection asapositivemeansofdetermining thatavalve'sdiskwillfull-stroke exerciseopenorofverifying closurecapability.
Thelicenseeiscurrently proposing tomeetPosition2.Assurance ofproperreassembly willbeprovidedbyperforming aleaktestorpartial-flow testpriortoreturning avalvetoservicefollowing disassembly.
However,thelicenseeintendstoinspecteachcheckvalveonlyonceinthe10yearInservice Inspection programinterval.
AsdefinedinPosition2,inordertosupportextension ofthevalvedisassembly/inspection intervals tolongerthanonceevery6years,i.e.,incasesof"extremehardship,"
licensees shouldperformareviewoftheinstallation ofeachvalveaddressing the"EPRIApplications Guidelines forCheckValvesinNuclearPowerPlants"forproblematic locations.
Thelicenseeshouldjustifytheextremehardship, including adiscussion onwhynon-int'rusive techniques cannotbeused.Additionally, thelicenseestatesthatvalveswillbeleaktestedorpartial-flow testedfollowing disassembly.
Ifpossible, partialvalvestrokingquarterly orduringcoldshutdowns, orafterreassembly, mustbeperformed.
ReliefisgrantedperGenericLetter89-04,Position1,tofull-stroke exercisethevalvesopenwithlessthantheaccidentflowrate,providedallcriteriainPosition1aremet.Ifthelicenseedetermines thatfull-stroke exercising isimpractical, reliefisgrantedperPosition2todisassemble/inspect thesecheckvalves,providedthelicenseemeetsallthecriteriainPosition2,including reviewing theinstallation ofthevalves,demonstrating extremehardship, andpartial-stroke exercising following reassembly andatcoldshutdownifpractical.
Withrespecttoexercising thevalveclosed,OMa-1988Part10,4.3.2.2allowsfull-stroke exercising thatisnotpracticable duringoperation orcoldshutdowntobedeferredtorefueling outages.RelieftousetheTechnical Specification requirements isnotrequiredpursuantto550.55a9(f)(4)(iv),
providedthelicenseeimplements 94.3.2.2andallrelatedrequirements, including Part10,94.3.2.2(h) and96-2.Implementation oftheserelatedrequirements issubjecttoNRCinspection.
(TERSection3.2.2)St.LucieResponse:
Thisactionitemisidentical toitem4.9oftheNRCSEissuedAugust23,1993.FPLresponded tothisactionitemintheresponsetothepreviousSE.TERSection5.9NRCRecommended Action:InValveReliefRequestVR-14,thelicenseeisproposing topartial-stroke exerciseatcoldshutdowns andrefueling outagesthefour12in.safetyinjection checkvalveswhichopentoprovideflowpathsfrom0hesafetyinjection headerstotheRCSandclosetoisolatetheheadersfromthehighpressureofthereactorcoolantsystem.Thelicenseeshouldevaluateifthevalveswillachieveafull-open positionwiththeproposedreducedtestflowrateof3,000GPM.Ifafull-open positioncanbereached,thelicenseeshouldperformthetestingwithflow.Theuseofalternate techniques, suchasnon-intrusive techniques, toverifythatvalveswillfullyopenisacceptable, asdiscussed inGenericLetter89-04,Position1.Ifthevalvescannotbefull-stroke exercised, theNRCdefinedanacceptable alternative to'thefull-stroke exercising requirement inPosition2,whereinitisstatedthattheNRCstaffpositionisthatvalvedisassembly andinspection canbeusedasapositivemeansofdetermining thatavalve'sdiskwillfull-stroke exerciseopenorofverifying closurecapability.
Thelicenseeiscurrently proposing tomeetPosition2.Assurance ofproperreassembly willbeprovidedbyperforming aleaktestorpartial-flow testpriortoreturning avalvetoservicefollowing disassembly.
However,thelicenseeintendstoinspecteachcheck15 valveonlyonceinthe10yearinservice inspection programinterval.
AsdefinedinPosition2,inordertosupportextension ofthevalvedisassembly/inspection intervals tolongerthanonceevery6years,i.e.,incasesof"extremehardship,"
licensees shouldperformareviewoftheinstallation ofeachvalveaddressing the"EPRIApplications Guidelines forCheckValvesinNuclearPowerPlants"forproblematic locations.
Thelicenseeshouldalsoincludeadiscussion onwhynon-intrusive techniques cannotbeused.Additionally, thelicenseestatesthatthevalvewillbeleaktestedorpartial-flow testedfollowing disassembly.
Position2requiresthat,ifpossible, partialvalvestrokingquarterly orduringcoldshutdowns, orafterreassembly, mustbeperformed.
ReliefisgrantedperGenericLetter89-04,Position1,tofull-stroke exercisethevalvesopenwithlessthantheaccidentflowrate,providedallcriteriainPosition1aremet.Ifthelicenseedetermines thatfull-stroke exercising isimpractical, reliefisgrantedperPosition2todisassemble/inspect thesecheckvalves,providedthelicenseemeetsa'llthecriteriainPosition2,including reviewing theinstallation ofthevalves,demonstrating extremehardship, andpartial-stroke exercising following reassembly andatcoldshutdownifpractical.
Withrespecttoexercising thevalveclosed,verification thatavalveisintheclosedpositioncanbedonebyvisualobservation, byanelectrical signalinitiated byaposition-indicating device,byobservation ofappropriate pressureindication inthesystem,byleaktesting,orbyotherpositive'eans.
Thelicenseedoeshaveinstrumentation tocontinuously monitorupstreampressure.
BasedontheTechnical Specifications, itappearsthatfollowing thepartial-stroke exerciseatcoldshutdowns, verification thatthevalveshaveclosedwillbeperformed andreliefwouldnotberequired.
Thelicenseeshouldexercisethesevalvesclosedatcoldshutdowns orrevisetherequestaccordingly.
(TERSection3.2.3)St.LucieResponse:
Thisactionitemisidentical toitem4.10oftheNRCSEissuedAugust23,1993.FPLresponded tothisactionitemintheresponsetothepreviousSE.TERSection5.10NRCRecommended Action:ThelicenseestatesinVR-1thatvalvetestingneednotbeperformed moreoftenthanonceeverycoldshutdown, exceptasprovidedforinIWV-3417(a),
whichrequiresmorefrequenttestingasaresultofdegradedstroketimes.TheASMEissuedaCodeinterpretation (Xl-1-92-41) thatstatesthatitistheintentofSectionXl,IWV-3410and3520,torequiretestingofvalveseverythreemonths,including duringextendedshutdownperiods,forvalvesotherthanthoseinsystemsdeclaredinoperable ornotV requiredtobeoperable(IWV-3416).
Therefore, duringplantshutdownperiods,whenthevalvescanbeexercised, thelicenseeshouldexercisevalveseverythreemonthsinaccordance withtheCodeorprovideareliefrequest.Additionally, ifspecificvalvescannotbetestedduringanycoldshutdown(i.e.,dueto"thelackofplantconditions neededfortesting"),
specificapprovalisrequiredtodefertesting.Thelicenseeshouldrevisethecoldshutdownjustifications, asrequired, todiscusstheconditions underwhichtestingcannotbeperformed duringanycoldshutdowns.
St.LucieResponse:
ReliefrequestVR-1hasbeenwithdrawn.
OMa-1988, Part10,4.2.1.2(g)and4.3.2.2(g)havebeenauthorized forimplementation.
Theprovision thatvalvetestingneednotbeperformed moreoftenthanonceeverycoldshutdownhasbeendeleted.Valvesthatcanbeexercised duringcoldshutdownperiodswillbeexercised everythreemonthsinaccordance withtheCodeortheywillbedeclaredoutofserviceuntilsuchtestingcanbecompleted.
Theplantadministrative procedure governing ASMECodetesting,ofpumpsandvalvesstatesthefollowing:
"Iftheunitremainsincoldshutdownforgreaterthan90days,thecoldshutdownvalvesshallbeexercised again.Plantstartupshouldnotbedelayedbecauseoftestingaslongasareasonable goodfaitheffortwasmade."TERSection5.11NRCRecommended Action:Forthefollowing checkvalves,thelicenseehasnotidentified anyclosedpositiontestingrequirement inthevalveprogramtable.Thelicenseeshouldreviewthesafetyfunctions ofthesevalvesandrevisetheprogram,ifnecessary:
VR-5:VR-7'R-8'R-11:
VR-21:VR-32:V-2177,2190,2191and2526V-07000andV-07001V-3401andV-3410V-3113,V-3133,V-3143andV-3766V-07129andV-07143V-3101St.LucieResponse:
V-2177:Closureisnotrequiredasthisfunctionisprovidedbynormallyclosedisolation valve,V-2514.V-2190:Thereisnorequirement forthischeckvalvetocloseduringaSIAStopreventrecirculation oftheemergency borateflowbacktotheBAMTsorthesuctionoftherunningBAMpumps.Thisisbecauseanyleakagepastthevalvewouldbeavailable tothechargingpumpsthroughthegravityfeedline.17 V-2191:Closureisnotrequiredasthisfunctionisprovidedbynormallyclosedisolation valve,V-2504.Additionally, ifV-2504wereopenandV-2191failedtocloseanyinventory divertedtotheRWTwouldstillbeavailable foremergency borationfromtheRWT.V-2526:Thereisnosafetyrelatedrequirement forthisvalvetoclose.Theonlypositionthisvalveisrequiredtobeinduringanaccidentisopen,allowingboricacidtothesuctionofthechargingpumpsviatheboricacidmakeuppumpsorthegravityfeedlinesfromtheboricacidmakeuptanks.V-07000andV-07001:Closureisnotrequiredasthisfunctionisredundantly providedbytheLPSIpumpsuctionisolation valves.V-3401andV-3410:Closureisnotrequiredasthisfunctionisredundantly providedbythepumpdischarge checkvalves.V-3113,V-3133,V-3143andV-3766:Closureofthesevalvesisnotrequiredasthisfunctionisredundant totheHPSIheadermotoroperatedisolation valves.ThesevalvesarenotRCSpressureisolation valves.V-07129andV-07143:Closurefunctionisprovidedbythepumpsdischarge manualisolation valves(V-07130andV-07145)duringshutdowncooling.Thereisnosourceofbackflowinthecontainment spraymodeofoperation.
V-3101:Sincethevalveisnormallyisolatedbyanupstreammanualisolation valve,exercising inthecloseddirection isnotrequired.
TERSection5.12NRCRecommended Action:ForreliefrequestsVR-8,VR-10,VR-12,thelicenseestatesthatthealternate testingsatisfies therequirement ofGenericLetter89-04,Position1.Asdiscussed inPosition1,theNRCstaffpositionisthatpassingthemaximumrequiredaccidentcondition flowratethroughthevalveisanacceptable full-stroke.
Itisassumedthatthefull-flow exerciseproposedbythelicenseecomplieswiththisposition.
Ifothertechniques areused,suchasnon-intrusive techniques atreducedflowrate,thelicenseemustcomplywiththesixcriteriarequiredbyPosition1.Thelicenseeshouldclarifythisstatement ineachrequest.St.LucieResponse:
ValvereliefrequestsVR-8,10and12havebeendeletedwiththejustifications fortesting'the valvesduringrefueling outagesnowdescribed inAppendixF:Refueling OutageJustifications.
Thesevalvesarefullstrokedbypassingthemaximumrequiredaccidentcondition flowratethroughthevalves.OMa-1988, Part10,%4.3.2.2isusedtojustifydeferring thetestingtorefueling outages.18 TERSection5.13NRCRecommended Action:Thelicenseeshouldclarifywhythevalveprogramtablereferences VR-19whenitindicates thatV-3414andV-3427willbetestedclosedquarterly.
St.LucieResponse:
Thereference toVR-19hasbeenremovedfromthevalveprogramtableforvalvesV-3414andV-3427.TERSection5.14NRCRecommended Action:Thelicenseehasstatedthatthevalvesreferenced inVR-12"willbepartial-stroke exercised totheopenpositionandsubsequently strokedclosedduringcoldshutdowns perVR-1"andthebasisonlydiscusses theimpracticality oftestingquarterly.
However,thevalveprogramtableidentifies thetestfrequency as"SP"asperVR-12andnot"CS",andthelicenseeadditionally statesthatthevalveswillbeverifiedclosedduringthePIVleaktests.Itisassumedthatthevalvesareexercised totheclosedpositioninaccordance withtheCodeduringcoldshutdowns, inadditiontothePIVleaktest.Ifexercising thevalvesclosedatcoldshutdowns isimpractical, therequest's basismustberevisedtodiscusstheimpracticality.
St.LucieResponse:
Thevalveprogramtablehasbeenrevisedtoindicatethatthevalvesaretobetestedclosedduringcoldshutdowns.
Thebasisfortestingthesevalvesatcoldshutdowns isdescribed inAppendixE:ColdShutdownJustifications.
TERSection5.15NRCRecommended Action:Fromareviewoftheapplicable flowdiagrams, 2998-G-078, Sheet130,Rev.4,andthecontinuation onflowdiagram2998-G-088, Rev.19,forvalvesV-3104andV-3105,itappearsthatthereisaflowelementoneachrecirculation line,i.e.,FE-03-1-1 andFE-03-2-1, whichcouldbeusedtomeasuretherecirculation lineflow.ThelicenseeshouldclarifywhytheseelementscannotbeusedinReliefRequestVR-28.Additionally, thelicenseeshouldexplainwhythequarterly LPSIpumpflowtestdoesnotresultinarecirculation flowsufficient tocausefull-stroke exercising ofthesevalves.OMa-1988Part10.%4-3-2-2allowsfull-stroke exercising thatisnotpracticable duringplantoperation orcoldshutdowns tobedeferredtorefueling outages.Therefore, providedthelicenseefurnishes information onwhytheinstalled flowelementsornon-intrusive techniques cannotbeusedtoverifythevalves'ull-stroke openquarterly, thereliefrequested bythelicenseeis19 coveredbytherulemaking, effective September 8,1992,asdescribed above,andapprovalcouldberecommended.
However,ifquarterly full-stroke exercising ispractical, thelicenseemustcomplywiththeCoderequirements.
Thelicenseeshouldrevisethereliefrequest.St.LucieResponse:
FlowelementsFE-03-1-1 andFE-03-2-1 arestraponultrasonic flowinstruments designedtoannunciate lowflowalarmsinthecontrolroomtowarnoperators oflowflowconditions associated withtheLPSIpumps.Theultrasonic flowinstruments areusedexclusively toprovidelowflowalarms.TheflowelementsandalarmswereaddedtotheoriginaldesignoftheLPSIsystemtoaddressNRCquestions relatedtoECCSpumpoperation.
Theinstruments weredesignedtoalerttheoperators topumplowflowconditions, butwereneverintendedtohavetheaccuracyneededtoquantifythedesignedflowrates fromthepumpthroughthecheckvalves.Actualpumprecirculation flowratesaresignificantly limitedbytheflowrestriction orificesineachrecirculation line.Actualflowrates asmeasuredbylevelincreases intheRWTovertimehaveproventobeonlyminimally greaterthanthe100gpmflowratethattheorificewasdesignedtoprovide.Sincetheorificeissuchamajorcontributor totheflowlossesinthelinewiththecheckvalveonlycontributing asmallportionoftheflowrestriction, ahighdegreeofaccuracyinflowmeasurement isneededtodetectdegradation ofthecheckvalves.StraponflowelementsofthenatureofFE-03-1-1 andFE-03-2-1 donothavetherequiredaccuracy.
Usingtheacousticflowelementstoverifythecheckvalvesopenwouldbeimpractical.
Theaccuracyofthestraponultrasonic devicesisquestionable forthisapplication andcouldunnecessarily placethecheckvalvesoutofserviceorpreventcheckvalvedegradation frombeingdetected.
Thetestingdescribed intheprogramisadequatetoensurethecheckvalvesareperforming theirrequiredsafetyfunction.
Precisemeasurements ofpumprecirculation flowratesareobtainedeachrefueling outagebymeasuring theRWTlevelincreaseovertimewhiledrainingthepressurizer orrefueling cavity.Duringthequarterly LPSIpumpruns,flowthroughtherecirculation linesisverifiedbydetermining thatheatisbeingremovedfromthepumps.Pumpheatremovalisthemajordesigncriteriafortherecirculation lines.Information fromthevalvemanufacturer statesthatflowvelocities of32.8ft/secarerequiredforthecheckvalvestoreachtheirfullopenposition.
Duetotheflowreducingorifice,flowvelocities ofonlyabout10ft/seccanbeachieved.
Thelackofsufficient flowtocausefull-stroke exercising ofthesevalvesmakestheuseofnon-intrusive techniques impractical.
TERSection5.16NRCRecommended Action:20
Anomalies identified duringthereviewofcoldshutdownjustifications areidentified below:Thefollowing valvesarenotexercised closed.Thelicenseeshouldverifythatthevalvesdonotperformasafetyfunctionintheclosedposition, orrevisetheprogramasappropriate:
RC-1:V-1460throughV-1466,reactorvesselandpressurizer gasvents;1in.normally-closed, solenoid-operated globevalves.RC-2:V-1474andV-1475,pressurizer power-operated reliefvalves;3in.solenoid-operated, normallyclosedglobevalves.CV-3.2:V-2431,auxiliary pressurizer spraycheckvalve;2in.normallyclosedcheckvalve.CV-3.3:V-2440,chargingpumpdischarge checkvalvetosafetyinjection; 2in.normallyclosedcheckvalve.Sl-l.l:V-3106andV-3107,LPSIpumpdischarge checkvalves;10in.normallyclosedcheckvalves.Sl-3.1:V-03002throughV-03005,Safetyinjection tank(SIT)drainlinecheckvalves;1in.normallyclosedcheckvalves.FW-1.2:V-09107,V-09123,andV-09139,auxiliary feedwater pumpdischarge checkvalves;4in.normallyclosedcheckvalves.FW-1.3:V-09119,V-09135,V-09151,andV-09157,auxiliary feedwater supplycheckvalves;4in.normallyclosedcheckvalves.CC-1.2:HCV-14-3A&B,shutdownheatexchanger returnvalves;14in.normallyopen,failopen,diaphragm-operated butterfly valves.St.LucieResponse:
RC-1:V-1460throughV-1466:Testinginthecloseddirection isnotrequiredasthelossofreactorcoolantthroughtheone-inchlinesisjudgedinsignificant fromtheaspectofaccidentmitigation.
Theselinesareequippedwithflowrestricting orificeslimitingthelossofcoolantliquidtowithinmakeupcapacity.
RC-2:V-1474andV-1475:Closureis,notrequiredasthisfunctionisprovidedbythePORVblockvalves(V-1476andV-1477)whicharecreditedforisolating theassociated PORV.CV-3.2:V-2431:Thisvalveisnotrequiredtoclosetoperformasafetyfunction.
Thisvalveisnotatahighpressure/low pressureinterface.
Passivefailureofupstreampipingisnotconsidered credibleasitisdesignedtooperateatpressures exceeding thenormalRCSpressure.
Nosinglefailureofanyactivecomponent canoccurthatwoulddivertflowfromtheRCSthroughthecharging21
headerifthisvalveweretofailtoclose.Isolation valvesSE-02-3andSE-02-4canalsobeclosedifrequired.
Additional'ly atleastonechargingpumpwillbeavailable tosupplyflowthroughthisvalveduringanysinglefailurescenario.
CV-3.3:V-2440:ClosureisnotrequiredsincethelineismanuallyisolatedbyvalveV-2340.V-2340isonlyopenedtoalignemergency borationflowfromthechargingpumpsthroughtheHPSIheaders.Underthiscondition V-2440isrequiredtoremainopenandhasnorequirement toclose.Sl-1.1:V-3106andV-3107:ThesevalvesarenotrequiredtoclosebecausetheLPSIpumpsareoperating orareisolatedfromadjoining systemsbyshutdowncoolingheatexchanger isolation valves,LPSIheaderisolation valves,andsafetyinjection headercheckvalvesduringanaccident.
Thusclosuretestingisnotrequired.
Sl-3.1:V-03002throughV-03005:ClosureisnotrequiredasthisfunctionisprovidedbyvalvesSE-03-1AthroughSE-03-1D.
FW-1.2:V-09107,V-09123,andV-09139:ClosureisnotrequiredasthisfunctionisprovidedbyvalvesSE-09-2throughSE-09-5.(seeresponsetosection5.2.A.2).
FW-1.3:V-09119,V-09135,V-09151,andV-09157:ClosureisnotrequiredasthisfunctionisprovidedbyvalvesMV-09-9throughMV-09-12andmanualvalvesV-09120,V-09136,V-09152,V-09158.(seeresponsetosection5.2.A.2)CC-1.2:HCV-14-3A&B:Thesevalvesareclosedduringnormaloperation todivertcomponent coolingwaterflowfromtheshutdowncoolingheatexchanger toothercomponents requiring coolingtosupportnormalpoweroperations.
Thevalvesopenedtosupplycoolingwatertotheshutdowncoolingheatexchanger forplantcooldownorforcoolingcontainment spraypumpdischarge forcontainment cooling.Thereisnorequirement forthisvalvetocloseotherthantosupportnormalplantoperations whichisnotrequiredtomitigatetheconsequences ofanaccidentortoshutdowntheplant.NRCRecommended Action:CV-3.5:V-2523,charginglineisolation valve;2in.diaphragm-operated, lockedopenglobevalve.ForV-2523,thefailuremodeistheopenposition.
Sincethevalveisonlyexercised totheclosedposition, thelicenseeshouldexplainwhynofailsafetesting(totheopenposition) isindicated inthevalveprogramtables.St.LucieResponse':
22 Thisairoperated, failopenvalveislockedopentoallowboroninjection tothereactorcoolantsystem.Thisvalvemayberequiredtocloseshouldthealternate borationflowpathviatheHPSIheaderbeutilized, inwhichcasethevalvewouldnotberequiredtobereopened.
Theabilityofthisvalvetostroketotheopenpositionortofailtotheopenpositionisnotasafetyrelatedfunctionandarenotrequiredtobetested.NRCRecommended Action:Sl-1.2:V-3463,Isolation ValveforSITTest/RWTReturnHeader;2in.manually-operated, lockedclosedgatevalve.According tothe.,flowdiagram,2998-G-078, Sheet'130, thetwooutboardcontainment isolation valvesforpenetration 41,2I-SE-03-2A and2B,arenormallyclosedandinparalleltoeachotherandinserieswithV-3463.TheValveProgramTablesindicatethatbothoftheoutboardvalvesareexercised openedquarterly.
Furthermore, Technical Specification Table3.6-2forcontainment isolation valvesindicates thatV-3463istestableduringplantoperation.
Therefore, thelicenseeshouldexplainwhyV-3463cannotbeexercised openquarterly.
St.LucieResponse:
Thejustifications fornottestingthisvalvequarterly hasbeenreviewedinresponsetothisSE.Thevalveprogramtablehasbeenrevisedtoindicatethatmanually-operated valveV-3463istobetestedquarterly.
Thecoldshutdownjustification forthisvalvehasbeendeleted.NRCRecommended Action:Sl-2.1:V-3114,V-3124,V-3134,andV-3144,LPSIcoldleginjection checkvalves;6in.checkvalves,normallyclosed.Thelicenseehasnotprovidedan'explanation ofwhythevalvescannotbeverifiedclosedquarterly.
Thereappeartobedrainortestconnections available bothimmediately upstreamandimmediately downstream ofeachofthesevalveswhichmaybeabletobeusedforbothaquarterly part-stroke opentestandaquarterly testforclosure.Therefore, thelicenseeshouldexplainwhysuchtestingcouldnotbeperformed quarterly.
St.LucieResponse:
Thejustification fornottestingthesevalvesquarterly hasbeenincludedinRevision1oftheSt.LucieUnit2ISTProgramSecondTenYearInterval.
Thiscoldshutdownjustification statesthefollowing:
"Duringnormalplantoperation, theLPSIPumpscannotdevelopsufficient discharge pressuretopumpthroughthesevalvestotheRCSandexercisethemintheopendirection.
Theclosuretestscan23 onlybeperformed attheendoftheoutageafterthevalveshavebeenexercised openearlierbythepartialstrokeopentests."Thesearesimplecheckvalveswithnoexternalmeansofpositionindication.
Tocyclethevalvesopenutilizing thedrainortestconnections upstreamanddownstream ofeachofthesevalvesduringnormalplantoperation isimpractical.
Thedrainvalvedownstream ofthecheckvalvescannotbeopenedandusedasaflowpathforpartstrokingthecheckvalvesbecausetheyareexposedtothetotalvolumeandpressureoftheSIT.Theonlypractical meansofverifying closureisbyperforming aleaktestorbackflowtest.Thiswouldonlyconstitute avalidclosurestroketestofthevalvesonlyiftheycouldbeverifiedopenpriortothetest.Totestthecheckvalvesforclosuretheupstreamsideofthecheckvalvesmustbedepressurized anddrainedinordertocollectthebackleakagethroughthecheckvalves.Performing thistestrequiresaconsiderable effortsuchthattestingduringoperation wouldconstitute anunreasonable burdenontheplantstaff.Inaddition, thetestpersonnel musthandleuptoseveralgallonsofcontaminated waterpertest,someofwhichcouldbeunderpressurewhenfirstvented.Performing thistestprocedure eachquarterwouldresultinunnecessary personnel radiation exposures andpossiblepersonnel contaminations NRCRecommended Action:Sl-2.3:V-3545,V-3664,andV-3665,shutdowncoolingisolation andcrossconnectvalves,10in.motor-operated, lockedclosedgatevalves.ThelicenseeshouldexplainwhyafailureofV-3664andV-3665intheopenpositionwouldjeopardize theintegrity oftheLPSISystemsincetheShutdowncoolingsystemvalvesV-3480,V-3481,V-3651andV-3652areimmediately upstreamandinterlocked closedasdescribed forS1-2.2.Similarly, thelicenseeshoulddescribeunderwhatconditions thecrossconnectvalveV-3545isopenedduringtheshutdowncoolingmodeofoperation andalsojustifythatitsfailureduringnormalplantoperation wouldjeopardize theintegrity oftheLPSISystemsincetheitappearsthatonlyshutdowncoolingwouldbeaffectedandthatshutdowncoolingcouldstillbeaccomplished withthevalveopen.St.LucieResponse:
Thejustifications fornottestingthesevalvesquarterly havebeenreviewedinresponsetothisSE.Thevalveprogramtablehasbeenrevisedtoindicatethatshutdowncoolingisolation valvesV-3664andV-3665aretobetestedquarterly.
Thecoldshutdownjust).fication forthesevalveshasbeendeleted.a24 Therevisedjustification fornottestingshutdowncoolingcrossconnectvalveV-3545quarterly hasbeenincludedinRevision1oftheSt.LucieUnit2ISTProgramSecondTenYearInterval.
Thiscoldshutdownjustification statesthefollowing:
"Thebreakerforthisvalveisrequiredtobedeenergized'xcept duringplantcoldshutdownorrefueling modestomeetpositionC.1toRegulatory Guide1.63revision2.Thisistoprotectthemechanical integrity ofthevalveselectrical penetration assemblyshouldthemaximumshort-circuit vstimecondition occurgivensinglerandomfailureofcircuitoverloadprotection devices."
NRCRecommended Action:MS-1.1:HCV-08-1A&B,mainsteamisolation valves;34in.normallyopen,piston-operated'globe valves.ThelicenseeshouldindicateintheTableswhatisthefailuremodepositionofthesevalves.St.LucieResponse:
TheTableshavebeenrevisedtoindicatethatthefailuremodeofthemainsteamisolation valves,HCV-08-1A&B,istofailcloseinthecurrentrevisionoftheprogram.Thetablehasalsobeenrevisedtoindicatethatthevalvesaretobefailclosetestedduringthecoldshutdownclosestroketest.NRCRecommended Action:MS-1.2:V-08130andV-08163,steam-driven AFWpumpsteamsupplycheckvalves;4in.normallyopencheckvalves.Inthevalveprogramtables,thesecheckvalvesarepart-stroke exercised totheopenpositionquarterly, andfull-stroke exercised totheopenpositionatcoldshutdowns.
ValvereliefrequestVR-31calledforpart-stroke exercising totheopenpositionmonthlyandfull-stroke exercising atcoldshutdowns.
Thelicenseeshouldclarifytheapparentdiscrepancies inthetestingfrequencies.
St.LucieResponse:
ValvereliefrequestVR-31hasbeenrevisedtoindicatethatthepart-stroke exercising totheopenpositionofthesteam-driven AFWpumpsteamsupplycheckvalves,V-08130andV-08163,istobeperformed quarterly.
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